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XYLIDINE, ALL ISOMERS (DIMETHYLAMINOBENZENE)†

Chemical Identification
CAS #	1300-73-8
Formula	C₈H₁₁N
Synonyms	2,4-dimethylaniline; 2,4-dimethylaminobenzene; aminodimethylbenzene; 2,4-xylidine; 2,5-xylidine; (there are 6 isomers for xylidine)

Physical Properties
Physical description	Pale-yellow to brown liquid with a weak, aromatic, amine-like odor.
Boiling point	415-439°F	Molecular weight	121.2
Freezing point/melting point	-33°F	Vapor pressure	<1 mmHg
Flash point	206°F (2,3-)	Vapor density
Specific gravity	0.98	Ionization potential	7.65eV (2,4-) 7.30eV (2,6-)
Lower explosive limit (LEL)	1% (o-isomer)	Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2600
Sampling group
Sampler/Sampling media	Silica gel tube (150/75 mg) [SKC 226-10]
Sampling time^*
Sampling volume (TWA)^*	3-20 L
Sampling flow rate (TWA)^*	0.02-0.2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	NIOSH 2002 (fully validated)
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	5 ppm (25 mg/m³)	REL-TWA	2 ppm (10 mg/m³)	TLV-TWA	0.5 ppm (inhalable fraction and vapor) [1999]	PEL-TWA	0.5 ppm (2.5 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	Y	Skin notation	Y	Skin notation	Y	Skin notation	Y
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	50 ppm
Carcinogenic classifications: TLV-A3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Xylidines

NIOSH: Pocket Guide to Chemical Hazards - Xylidine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Xylidine (mixed isomers). See annual publication for most recent information.

Last Updated Date : 01/14/2021

2,6-DI-TERT-BUTYL-P-CRESOL

Chemical Identification
CAS #	128-37-0
Formula	C₁₅H₂₄O
Synonyms	BHT; butylated hydroxytoluene; dibutylated hydroxytoluene; 4-methyl-2,6-di-tert-butyl phenol

Physical Properties
Physical description	White to pale-yellow, crystalline solid with a slight, phenolic odor.
Boiling point	509°F	Molecular weight	220.4
Freezing point/melting point	158°F	Vapor pressure	0.01 mmHg
Flash point	261°F	Vapor density
Specific gravity	1.05	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	2	NFPA fire rating	1
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2683
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA	10 mg/m³	TLV-TWA	2 mg/m³ (inhalable fraction and vapor) [2001]	PEL-TWA	10 mg/m³
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	N	Skin notation	N	Skin notation	N
Notes: Not established		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: TLV-A4, IARC-3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Butylated hydroxytoluene

NIOSH: Pocket Guide to Chemical Hazards - 2,6-Di-tert-butyl-p-cresol

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Butylated hydroxytoluene. See annual publication for most recent information.

Last Updated Date : 12/15/2020

DIMETHYLACETAMIDE†

Chemical Identification
CAS #	127-19-5
Formula	C₄H₉NO
Synonyms	N,N-dimethyl acetamide; DMAC; acetic acid dimethylamide

Physical Properties
Physical description	Colorless liquid with a weak, ammonia- or fish-like odor.
Boiling point	329°F	Molecular weight	87.1
Freezing point/melting point	-4°F	Vapor pressure	2 mmHg
Flash point	158°F (open cup)	Vapor density
Specific gravity	0.94	Ionization potential	8.81 eV
Lower explosive limit (LEL)	1.8% at 212°F	Upper explosive limit (UEL)	11.5% at 320°F
NFPA health rating	2	NFPA fire rating	2
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0927
Sampling group
Sampler/Sampling media	Silica gel tube (150/75 mg) [SKC 226-10]
Sampling time^*
Sampling volume (TWA)^*	80 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	NIOSH 2004 (fully validated)
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	10 ppm (35 mg/m³)	REL-TWA	10 ppm (35 mg/m³)	TLV-TWA	10 ppm [2017]	PEL-TWA	10 ppm (35 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	Y	Skin notation	Y	Skin notation	Y	Skin notation	Y
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	300 ppm
Carcinogenic classifications: TLV-A3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dimethylacetamide

NIOSH: Pocket Guide to Chemical Hazards - Dimethyl acetamide

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dimethylacetamide. See annual publication for most recent information.
Lee, C.-Y., Jung, S.-J., Kim, S.-A., Park, K.-S. and Ha, B.-G. Incidence of dimethylacetamide induced hepatic injury among new employees in a cohort of elastane fibre workers. Occup. Environ. Med. 63(10): 688-693, 2006.
Nimiyama, T., et al. Dermal absorption of N,N-dimethylacetamide in human volunteers. Int. Arch. Occup. Environ. Health 73(2): 121-126, 2000.
Okuda, H., et al. Developmental toxicity induced by inhalation exposure of pregnant rats to N,N-dimethylacetamide. J. Occup. Health 48(3): 154-160, 2006.
Perbellini, L., Princivalle, A., Caivano, M. and Montagnani, R. Biological monitoring of occupational exposure to N,N-dimethylacetamide with identification of a new metabolite. Occup. Environ. Med. 60(1): 746-751.
Pohanish, R.P. (editor) N,N-Dimethylacetamide. In Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 905-907.

Last Updated Date : 12/28/2020

PERCHLOROETHYLENE (TETRACHLOROETHYLENE)†

Chemical Identification
CAS #	127-18-4
Formula	C₂Cl₄
Synonyms	tetrachloroethylene, carbon bichloride, 1,1,2,2-tetrachloroethylene, 1,1,2,2-tetrachloroethene

Physical Properties
Physical description	Colorless liquid with a mild, chloroform-like odor.
Boiling point	250°F	Molecular weight	165.8
Freezing point/melting point	-2°F	Vapor pressure	14 mmHg
Flash point		Vapor density	5.83
Specific gravity	1.62	Ionization potential	9.32 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	2	NFPA fire rating	0
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2020	2020
Sampling group	OVSG-1
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]	SKC 575-002 Passive Sampler [SKC 575-002]
Sampling time^*	240 min (≥1 min Peak; ≤5 min C)	<240 min TWA; >5min C, Peak
Sampling volume (TWA)^*	12 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*	0.05 L (Peak); 0.25 L (C)
Sampling flow rate (STEL/Peak/C)^*	0.05 L/min
Analytical method instruments	GC-FID	GC-FID
Method reference	OSHA 5000 (fully validated)	OSHA 1001 (fully validated)
Notes		To obtain sampling and analytical error similar to that available with active sampling, knowledge of the atmospheric pressure and temperature are required, and these should be obtained using NIST-traceable devices. If that is not possible, temperature is assumed to be 22.2 °C, and the atmospheric pressure is estimated based on the elevation of the sampling location. When estimates are used in place of traceable measurements the sampling and analytical error associated with passive sampling is substantially increased, and this makes it more difficult to demonstrate overexposures after considering the 95% lower confidence limit.
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tubes	Detector tubes	Detector tubes	Detector tubes	Detector tubes	CMS Chip
Model/Type	Dräger - Perchloroethylene 0.1/a, 8101551; 2/a, 8101501; 10/b, CH30701	Gastec 133HA	Gastec 133L, 133LL	Gastec 133D	Matheson-Kitagawa 8014-135SA, 8014-243U, 8014-135SB, 8014-135SH	Perchloroethylene, 5-150 ppm range
Sampling information (see manufacturer instructions)	0.1/a: 3-9 strokes, 0.2-4 ppm range, uncertainty approx 33%. 2/a: 1-5 strokes, 2-300 ppm range, uncertainty approx 25%. 10/b: 3 strokes, 5-500 ppm range, uncertainty approx 25%	4 strokes, 0.05-50 ppm range, uncertainty 16% for 0.2-10 ppm, 8% for 10-50 ppm	0.5 - 2 strokes, 133L: 0.4-75 ppm range, uncertainty 16% for 2-5 ppm, 8% for 5-25 ppm. 133LL: 0.05-9 ppm range, uncertainty 16% for 0.2-1 ppm, 8% for 1-3 ppm	1-8 hours, 3-150 ppm range, uncertainty 25% for 25-50 ppm-h, 16% for 50-150 ppm-h	follow mfr instructions. 8014-135SA: approx 5-300 ppm range, 8014-243U: approx 5-160 ppm range, 8014-135SB: approx 1-10 ppm, 8014-135SH: 0.05-2% range

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	100 ppm	REL-TWA		TLV-TWA	25 ppm [1990]	PEL-TWA	25 ppm (170 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	100 ppm [1990]	PEL-STEL	100 ppm (685 mg/m³)
PEL-C	200 ppm; 300 ppm (Peak) [a single time up to 5 min for any 3 hrs]	REL-C		TLV-C		PEL-C	300 ppm
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-2. The Construction and Maritime PEL is 100 ppm (670 mg/m³) as an 8 hr TWA. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards.		Notes: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION (LOQ 0.4 ppm). See Appendix A		Notes: BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	150 ppm
Carcinogenic classifications: IARC-2A, NIOSH-Ca, NTP-R, TLV-A3		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 100 ppm/200 ppm/1000 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Perchloroethylene

NIOSH: Pocket Guide to Chemical Hazards - Tetrachloroethylene

Literature References

EPA: Hazard Summary - Tetrachloroethylene
ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Tetrachloroethylene. See annual publication for most recent information.
ANSI: USA Standard Acceptable Concentrations of Tetrachloroethylene. 1967.
EPA IRIS Tetrachloroethylene, 2012
IARC, Lancet Oncology, 13:1192-1193, 2011
NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Tetrachloroethylene. 1976.
NIOSH: Occupational Health Guideline for Tetrachloroethylene. 1978.
Gobba, F., Righi, E., Fantuzzi, G., Roccatto, L., Predieri, G., and Aggazzotti, G.: Perchloroethylene in alveolar air, blood, and urine as biologic indices of low-level exposure. J. Occup. Environ. Med. 45(11): 1152-1157, 2003.
Gobba, F., Righi, E., Fantuzzi, G., Predieri, G., Cavazzuti, L. and Aggazzotti, G.: Two-year evolution of perchloroethylene-induced color-vision loss. Arch. Environ. Health 53(3): 196-198, 1998.
Lash, L.H. and Parker, J.C.: Hepatic and renal toxicities associated with perchlorethylene. Pharmacol. Rev. 53(2): 177-208, 2001.
Lynge E. et al.: Cancer in persons working in dry cleaning in the Nordic countries. Environ Health Perspect. 114(2):213-9, February 2006.
Ruder, A.M., Ward, E.M. and Brown, D.P.: Mortality in dry-cleaning workers: an update. Am. J. Ind. Med. 39(2): 121-132, 2001.

Last Updated Date : 06/06/2022

Group Sampling Information
Sampling Media	Sampling Time (If there are exceptions they will be in Notes)	TWA Sampling Volume (If there are exceptions they will be in Notes)	TWA Flow Rate (If there are exceptions they will be in Notes)
CSC Tube (100/50 mg sections, 20/40 mesh), [SKC 226-01]	240 min	12 L	0.05 L/min

Analytes Sampling Information
Analytes	IMIS Code	Wipe Sampling
Isobutyl Acetate	1534	No
n-Butyl Acetate	0440	No
sec-Butyl Acetate	0441	No
tert-Butyl Acetate	0442	No
Toluene**	2460	No
Ethyl Benzene	1080	No
Perchloroethylene (Tetrachloroethylene)**	2020	No
Trichloroethylene**	2490	No
Xylene	2590	No
Trimethylbenzene	2505	No
Benzene***	0320	No
Ethyl Acetate****	1040	No
n-Propyl Acetate‡	2180	No
Pentane‡‡	1990	No
Cyclohexane‡‡‡	0810	No
Heptane*	1371	No
n-Hexane‡‡‡‡	1380	No
Nonane*	N807	No
Octane*	1957	No

Notes

Request any (up to three (3)) of these analytes together.

Alternatively request IMIS Code Q115 and SLTC will report any significant amounts of these analytes.

Results for unrequested analytes in this group will be reported if significant amount are found.

Toluene, sec-Butyl Acetate, Benzene and Isobutyl Alcohol all have/are known interferences. Please indicate on the 91A which of these compounds are known to be present.

There is no need to contact SLTC before sampling.

*80 min (4L)

**Peak sampling 1 min (0.05 L) and Ceiling sampling 5 min (0.25 L)

***STEL sampling 15 min (0.75 L)

****120 min (6 L)

‡200 min (10 L)

‡‡45 min (2.25 L)

‡‡‡190 min (9.5 L)

‡‡‡‡98 min (4.9 L)

β-CHLOROPRENE (2-CHLORO-1,3-BUTADIENE)†

Chemical Identification
CAS #	126-99-8
Formula	C₄H₅Cl
Synonyms	2-chloro-1,3-butadiene; chlorobutadiene; chloroprene

Physical Properties
Physical description	Colorless liquid with a pungent, ether-like odor.
Boiling point	139°F	Molecular weight	88.5
Freezing point/melting point	-153°F	Vapor pressure	188 mmHg
Flash point	-4°F	Vapor density
Specific gravity	0.96	Ionization potential	8.79 eV
Lower explosive limit (LEL)	4.0%	Upper explosive limit (UEL)	20.0%
NFPA health rating	2	NFPA fire rating	3
NFPA reactivity rating	1	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0680
Sampling group
Sampler/Sampling media	Chromosorb® 106 (600/300 mg) [SKC 226-111A]
Sampling time^*	120 min
Sampling volume (TWA)^*	6 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*	1.5 L
Sampling flow rate (STEL/Peak/C)^*	0.1 L/min
Analytical method instruments	GC-ECD
Method reference	OSHA 112 (fully validated)
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media	Wipe with charcoal pad, seal in glass vial for shipment. [3M 3500]
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	25 ppm (90 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA	10 ppm (36 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	1 ppm (3.6 mg/m³) [15 minute]	TLV-C		PEL-C
Skin notation	Y	Skin notation	N	Skin notation	Y	Skin notation	NA
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes: CARCINOGEN (Ca); See Appendix A		Notes: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	300 ppm
Carcinogenic classifications: EPA-L, IARC-2B, NIOSH-Ca, NTP-R; TLV-A2		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Chloroprene, stabilized

NIOSH: Pocket Guide to Chemical Hazards - β-Chloroprene

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - β-Chloroprene. See annual publication for most recent information.
EPA Air Toxics Website: Chloroprene (2-Chloro-1,3-Butadiene). U.S. Environmental Protection Agency Technology Transfer Network.
Hurst, H.E. and Ali, M.Y.: Analyses of (1-chloroethenyl)oxirane headspace and hemoglobin N-valine adducts in erythrocytes indicate selective detoxification of (1-chloroethenyl)oxirane enantiomers. Chem. Biol. Interact. 166(1-3): 332-340, 2007.
Munter, T., Cottrell, L., Ghai, R., Golding, B.T. and Watson, W.P.: The metabolism and molecular toxicology of chloroprene. Chem. Biol. Interact. 166(1-3): 323-331, 2007.
No Author: Chloroprene. Report on Carcinogens (latest edition); U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program.
Pohanish, R.P. (editor): Chloroprene. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 591-593.
Sanotskii, I.V.: Aspects of the toxicology of chloroprene: immediate and long-term effects. Environ. Health Perspect. 17: 85-93, 1976.
Valentine, R. and Himmelstein, M.W.: Overview of the acute, subchronic, reproductive, developmental and genetic toxicology of β-chloroprene. Chem. Biol. Interact. 135-136: 81-100, 2001.

Last Updated Date : 04/30/2024

METHYL ACRYLONITRILE

Chemical Identification
CAS #	126-98-7
Formula	C₄H₅N
Synonyms	2-cyanopropene-1, 2-cyano-1-propene; isoprene cyanide; isopropenylnitrile; methacrylonitrile; à-methylacrylonitrile; 2-methylpropenenitrile

Physical Properties
Physical description	Colorless liquid with an odor like bitter almonds.
Boiling point	195°F	Molecular weight	67.1
Freezing point/melting point	-32.4°F	Vapor pressure	71 mmHg at 77°F
Flash point	55°F	Vapor density	2.31
Specific gravity	0.8001	Ionization potential
Lower explosive limit (LEL)	2%	Upper explosive limit (UEL)	6.8%
NFPA health rating	4	NFPA fire rating	3
NFPA reactivity rating	2	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Detector tube
Model/Type	Dräger 6730301	Gastec 192
Sampling information (see manufacturer instructions)	1-10 ppm range	0.2-32.0 ppm range

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA	1 ppm (3 mg/m³)	TLV-TWA	1 ppm [2010]	PEL-TWA	1 ppm (3 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	Y	Skin notation	Y	Skin notation	Y
Notes: Not established		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Methacrylonitrile, stabilized

NIOSH: Pocket Guide to Chemical Hazards - Methylacrylonitrile

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methylacrylonitrile. See annual publication for most recent information.

Last Updated Date : 01/28/2021

TRIBUTYL PHOSPHATE†

Chemical Identification
CAS #	126-73-8
Formula	C₁₂H₂₇O₄P
Synonyms	butyl phosphate; TBP; tributyl ester of phosphoric acid; tri-n-butyl phosphate

Physical Properties
Physical description	Colorless to pale-yellow, odorless liquid.
Boiling point	552°F	Molecular weight	266.36
Freezing point/melting point	<-112°F	Vapor pressure	0.004 mmHg at 77°F
Flash point	295°F (open cup)	Vapor density	9.2
Specific gravity	0.982 at 68°F	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	NFPA fire rating	1
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2477
Sampling group
Sampler/Sampling media	Mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) and filter spacer with Na₂CO₃ impregnated backup pad, in a 3-piece cassette [SKC 225-9001]
Sampling time^*
Sampling volume (TWA)^*	2-100 L
Sampling flow rate (TWA)^*	1-3 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FPD
Method reference	NIOSH 5034 (partially validated)
Notes	separate front and backup cassettes if two were used; seal cassettes firmly with plugs
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	5 mg/m³	REL-TWA	2 ppm (2.5 mg/m³)	TLV-TWA	5 mg/m³ (inhalable fraction and vapor) [2012]	PEL-TWA	0.2 ppm (2.5 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	30 ppm
Carcinogenic classifications: TLV-A3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Tributyl phosphate

NIOSH: Pocket Guide to Chemical Hazards - Tributyl phosphate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Tributyl phosphate. See annual publication for most recent information.

Last Updated Date : 01/28/2021

FERROVANADIUM (DUST)†

Chemical Identification
CAS #	12604-58-9
Formula	FeV
Synonyms	ferrovanadium

Physical Properties
Physical description	Dark, odorless particulate dispersed in air.
Boiling point		Molecular weight	106.8
Freezing point/melting point	2696-2768°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity		Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	1267 (total); request using analyte code 9135
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]
Sampling time^*	240-480 min
Sampling volume (TWA)^*	960 L
Sampling flow rate (TWA)^*	2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric
Method reference	OSHA PV2121 (partially validated)
Notes	If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for the applicable component and appropriate results will be reported.
Special requirements	FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!!

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	1 mg/m³	REL-TWA	1 mg/m³	TLV-TWA	1 mg/m³ [1990]	PEL-TWA	1 mg/m³
PEL-STEL		REL-STEL	3 mg/m³	TLV-STEL	3 mg/m³ [1990]	PEL-STEL	3 mg/m³
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes: Note: The REL also applies to Vanadium metal and Vanadium carbide.		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	500 mg/m³
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Not listed

NIOSH: Pocket Guide to Chemical Hazards - Ferrovanadium dust

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Ferrovanadium dust. See annual publication for most recent information.

Last Updated Date : 12/29/2020

DIMETHYLAMINE (ANHYDROUS)†

Chemical Identification
CAS #	124-40-3
Formula	C₂H₇N
Synonyms	N-methylmethanamine

Physical Properties
Physical description	Colorless gas with an ammonia- or fish-like odor.
Boiling point	44°F	Molecular weight	45.1
Freezing point/melting point	-134°F	Vapor pressure	1.7 atm
Flash point	20°F (liquid)	Vapor density	1.56
Specific gravity	0.67 (liquid at 44°F)	Ionization potential	8.24 eV
Lower explosive limit (LEL)	2.8%	Upper explosive limit (UEL)	14.4%
NFPA health rating	3	NFPA fire rating	4
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0928
Sampling group
Sampler/Sampling media	XAD-7 tube (80/40 mg) coated with 10% NBD chloride [SKC 226-96]
Sampling time^*	50 min
Sampling volume (TWA)^*	10 L
Sampling flow rate (TWA)^*	0.2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	HPLC
Method reference	OSHA 34 (fully validated)
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Infrared spectrophotometer
Model/Type	Gastec 180	Miran 1A & 1B
Sampling information (see manufacturer instructions)	1-60 ppm range	1.2 ppm@8.8 µm

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	10 ppm (18 mg/m³)	REL-TWA	10 ppm (18 mg/m³)	TLV-TWA	5 ppm [2013]	PEL-TWA	5 ppm (9.2 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	15 ppm [2013]	PEL-STEL	15 ppm (27.6 mg/m³)
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: dermal sensitizer (DSEN)		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	500 ppm
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.6 ppm/100 ppm/350 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dimethylamine, anhydrous

NIOSH: Pocket Guide to Chemical Hazards - Dimethylamine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dimethylamine. See annual publication for most recent information.
Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.

Last Updated Date : 12/28/2020

CARBON DIOXIDE†

Chemical Identification
CAS #	124-38-9
Formula	CO₂
Synonyms	carbonic acid gas; dry ice

Physical Properties
Physical description	Colorless, odorless gas.
Boiling point	sublimes	Molecular weight	44.0
Freezing point/melting point	-109°F (sublimes)	Vapor pressure	56.5 atm
Flash point		Vapor density	1.53
Specific gravity	1.56 at -110.2°F	Ionization potential	13.77 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0530	0530
Sampling group
Sampler/Sampling media	Dräger X-am 5600 Multi-Gas Detector with DrägerSensor IR CO2 ES NDIR sensor.	Five layer aluminized gas sampling bag [Calibrated Instruments GSB-P/10]
Sampling time^*
Sampling volume (TWA)^*		2-5 L
Sampling flow rate (TWA)^*		0.01-0.05 L/min
Sampling volume (STEL/Peak/C)^*		2-5 L
Sampling flow rate (STEL/Peak/C)^*		0.3 L/min
Analytical method instruments		GC-TCD
Method reference	OSHA 1027 (fully validated)	OSHA ID-172 (fully validated)
Notes		Use detector tubes for screening. If greater than PEL, order gas sampling bags. *Note for sampling with Cali-5-BondTM, 10 liter, five layer aluminized gas sampling bag: This gas sampling bag has an integrated twist on/off valve (V-NPB-2/00) Septum (A-SEPT/.750). The nickel-plated brass connection allows the user to control gas flow into or out of the bag by twisting the barbed stem open (counterclockwise) or closed (clockwise). The jagged barb firmly secures 3/16″ ID sample tubing to the stem of the valve.
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Detector tube	Detector tube	Infrared spectrophotometer	Infrared spectrophotometer	CMS Chip
Model/Type	Gastec 2L	Dräger - Carbon dioxide 0.1%/a CH23501	Matheson-Kitagawa 8014-126SA	Miran 1A & 1B	Miran 103	Carbon dioxide, 1-20 Vol% range; Carbon dioxide, 1000-25000 ppm range; Carbon dioxide, 200-3000 ppm range
Sampling information (see manufacturer instructions)	0.13-6.0% vol	0.5 - 6.0% vol	0.1-2.6% vol	0.4 ppm at 4.3 µm	2%@4.45 µm

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	5000 ppm (9000 mg/m³)	REL-TWA	5000 ppm (9000 mg/m³)	TLV-TWA		PEL-TWA	5000 ppm (9000 mg/m³)
PEL-STEL		REL-STEL	30,000 ppm (54,000 mg/m³)	TLV-STEL		PEL-STEL	30,000 ppm (54,000 mg/m³)
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: Visit the ACGIH TLV site for specific data		Notes: See Section 5198.
Health factors: See NIH-NLM PubChem.		IDLH	40,000 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Carbon dioxide

NIOSH: Pocket Guide to Chemical Hazards - Carbon dioxide

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Carbon Dioxide. See annual publication for most recent information.
Occupational Health Guidelines for Chemical Hazards. DHHS/ NIOSH Publication No. 81-123, (January 1981).
NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Carbon Dioxide. 1976.
Grant WM. Toxicology of the Eye. 3rd ed. Springfield, IL: Charles C. Thomas Publisher, p. 179, 1986.
Halpern P, Raskin Y, Sorkine P, Oganezov A. Exposure to extremely high concentrations of carbon dioxide - a clinical description of a mass casualty incident. Ann Emerg Med. 43(2):196-9; Feb 2004.

Last Updated Date : 05/23/2024

XYLIDINE, ALL ISOMERS (DIMETHYLAMINOBENZENE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

2,6-DI-TERT-BUTYL-P-CRESOL

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DIMETHYLACETAMIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PERCHLOROETHYLENE (TETRACHLOROETHYLENE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

β-CHLOROPRENE (2-CHLORO-1,3-BUTADIENE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

METHYL ACRYLONITRILE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TRIBUTYL PHOSPHATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

FERROVANADIUM (DUST)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DIMETHYLAMINE (ANHYDROUS)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

CARBON DIOXIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References