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MESITYL OXIDE†

Chemical Identification
CAS #	141-79-7
Formula	C₆H₁₀O
Synonyms	isobutenyl methyl ketone; isopropylideneacetone; methyl isobutenyl ketone; 4-methyl-3-penten-2-one

Physical Properties
Physical description	Oily, colorless to light-yellow liquid with a peppermint- or honey-like odor.
Boiling point	266°F	Molecular weight	98.2
Freezing point/melting point	-52°F	Vapor pressure	9 mmHg
Flash point	87°F	Vapor density
Specific gravity	0.853 at 68°F	Ionization potential	9.08 eV
Lower explosive limit (LEL)	1.4%	Upper explosive limit (UEL)	7.2%
NFPA health rating	3	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.)	1635
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	1-25 L
Sampling flow rate (TWA)^*	0.01-0.2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	NIOSH 1301 (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	Matheson-Kitagawa 8014-190U	Miran 1A & 1B
Sampling information (see manufacturer instructions)	5-100 ppm range	0.8 ppm@8.2 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	25 ppm (100 mg/m³)	REL-TWA	10 ppm (40 mg/m³)	TLV-TWA	15 ppm [1992]	PEL-TWA	15 ppm (60 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	25 ppm [1992]	PEL-STEL	25 ppm (100 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:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1400 ppm
Carcinogenic classifications: Not listed		Notes: 10 % of LEL
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Mesityl oxide

NIOSH: Pocket Guide to Chemical Hazards - Mesityl oxide

Literature References

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

Last Updated Date : 01/04/2021

ETHYL ACETATE†

Chemical Identification
CAS #	141-78-6
Formula	C₄H₈O₂
Synonyms	acetic ester; acetic ether; ethyl ester of acetic acid; ethyl ethanoate

Physical Properties
Physical description	Colorless liquid with an ether-like, fruity odor.
Boiling point	171°F	Molecular weight	88.1
Freezing point/melting point	117°F	Vapor pressure	73 mmHg
Flash point	24°F	Vapor density	3.04
Specific gravity	0.9	Ionization potential	10.01 eV
Lower explosive limit (LEL)	2%	Upper explosive limit (UEL)	11.5%
NFPA health rating	1	NFPA fire rating	3
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.)	1040
Sampling group	OVSG-1
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*	120 min
Sampling volume (TWA)^*	6 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	OSHA 5000 (fully validated)
Notes	Samples must be refrigerated for shipment and sent to the laboratory overnight. It is recommended that CSHOs contact the duty officer (801-233-5001) and alert them that samples will be received. 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.
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	400 ppm (1400 mg/m³)	REL-TWA	400 ppm (1400 mg/m³)	TLV-TWA	400 ppm [1979]	PEL-TWA	400 ppm (1400 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:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	2000 ppm
Carcinogenic classifications: Not listed		Notes: 10% of LEL
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Ethyl acetate

NIOSH: Pocket Guide to Chemical Hazards - Ethyl acetate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Ethyl Acetate. See annual publication for most recent information.
Coopman, V.A., Cordonnier, J.A., and De Meyere C.A.: Fatal workplace accident involving ethyl acetate - a distribution study. Forensic Sci. Int. 154(2-3): 92-95, 2005.
NIOSH: Occupational Health Guideline for Ethyl Acetate. 1978.

Last Updated Date : 04/17/2023

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)

DICROTOPHOS

Chemical Identification
CAS #	141-66-2
Formula	C₈H₁₆NO₅P
Synonyms	Bidrin; Carbicron; 2-dimethyl cis-2-dimethylcarbamoyl-1-methylvinylphosphate

Physical Properties
Physical description	Yellow-brown liquid with a mild, ester odor.
Boiling point	752°F	Molecular weight	237.2
Freezing point/melting point		Vapor pressure	0.0001 mmHg
Flash point	>200°F	Vapor density
Specific gravity	1.22 at 59°F	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.)	0902
Sampling group
Sampler/Sampling media	OSHA versatile sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg) with GFF enclosed [SKC 226-30-16]
Sampling time^*
Sampling volume (TWA)^*	480 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FPD
Method reference	OSHA PV2099 (partially 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 GFF (37 mm), Type A/E [AP4003705]
Bulk Method	Limit the amount of bulk submitted to 1 g or 1 mL.

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	0.25 mg/m³	TLV-TWA	0.05 mg/m³ (inhalable fraction and vapor) [1998]	PEL-TWA	0.25 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: dermal sensitizer (DSEN), BEI®		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 - Dicrotophos

NIOSH: Pocket Guide to Chemical Hazards - Dicrotophos

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dicrotophos. See annual publication for most recent information.
J.J. Mauget Company: INJECT-A-CIDE^® B Material Safety Data Sheet, Revised September 30, 2002, 9 pp.
Pohanish, R.P. (editor): Dicrotophos. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 847-850.

Last Updated Date : 12/28/2020

ETHANOLAMINE (2-AMINOETHANOL)†

Chemical Identification
CAS #	141-43-5
Formula	C₂H₇NO
Synonyms	2-aminoethanol; β-aminoethyl alcohol; ethylolamine; 2-hydroxyethylamine; monoethanolamine

Physical Properties
Physical description	Colorless, viscous liquid or solid (below 51°F) with an unpleasant, ammonia-like odor.
Boiling point	339°F	Molecular weight	61.1
Freezing point/melting point	51°F	Vapor pressure	0.4 mmHg
Flash point	186°F	Vapor density	2.1
Specific gravity	1.02	Ionization potential	8.96 eV
Lower explosive limit (LEL)	5.5%	Upper explosive limit (UEL)	17%
NFPA health rating	3	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.)	1030
Sampling group
Sampler/Sampling media	XAD-2 tube (80/40) coated with 10% 1-naphthylisothiocyanate (NITC) [SKC 226-30-18]
Sampling time^*	100 min
Sampling volume (TWA)^*	10 L
Sampling flow rate (TWA)^*	0.1 L/min
Sampling volume (STEL/Peak/C)^*	1.5 L
Sampling flow rate (STEL/Peak/C)^*	0.1 L/min
Analytical method instruments	HPLC-UV
Method reference	OSHA PV2111 (partially 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	3 ppm (6 mg/m³)	REL-TWA	3 ppm (8 mg/m³)	TLV-TWA		PEL-TWA	3 ppm (8 mg/m³)
PEL-STEL		REL-STEL	6 ppm (15 mg/m³)	TLV-STEL		PEL-STEL	6 ppm (15 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:
Health factors: See NIH-NLM PubChem.		IDLH	30 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 - Ethanolamine

NIOSH: Pocket Guide to Chemical Hazards - Ethanolamine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Ethanolamine. See annual publication for most recent information.
Geier, J., Lessmann, H., Schnuch, A. and Uter, W.: Contact sensitizations in metalworkers with occupational dermatitis exposed to water-based metalworking fluids: results of the research project "FaSt". Int. Arch. Occup. Environ. Health 77(8): 543-551, 2004.
Kamijo, Y., Soma, K., Inoue, A., Nagai, T. and Kurihara, K.: Acute respiratory distress syndrome following asthma-like symptoms from massive ingestion of a monoethanolamine-containing detergent. Vet. Hum. Toxicol. 46(2): 79-80, 2004.
NIOSH: Occupational Health Guideline for Ethanolamine. 1978.

Last Updated Date : 03/28/2024

BUTYL ACRYLATE

Chemical Identification
CAS #	141-32-2
Formula	C₇H₁₂O₂
Synonyms	butyl ester of acrylic acid; butyl 2-propenoate; n-butyl acrylate

Physical Properties
Physical description	Clear, colorless liquid with a strong, fruity odor.
Boiling point	293°F	Molecular weight	128.2
Freezing point/melting point	-83°F	Vapor pressure	4 mmHg
Flash point	103°F	Vapor density	4.42
Specific gravity	0.89	Ionization potential
Lower explosive limit (LEL)	1.5%	Upper explosive limit (UEL)	9.9%
NFPA health rating	3	NFPA fire rating	2
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.)	0450
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) coated with 10% t-butylcatechol [SKC 226-73]
Sampling time^*	240 min
Sampling volume (TWA)^*	12 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	OSHA PV2011 (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	Organic vapor analyzer
Model/Type	Matheson-Kitagawa 8014-211U
Sampling information (see manufacturer instructions)	follow mfr instructions, 5-60 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	10 ppm (55 mg/m³)	TLV-TWA	2 ppm [1996]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL	2 ppm (11 mg/m³)
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: dermal sensitizer (DSEN)		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: IARC-3, TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.05 ppm/25 ppm/250 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Butyl acrylate

NIOSH: Pocket Guide to Chemical Hazards - Butyl acrylate

Literature References

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

Last Updated Date : 12/18/2020

ETHYL ACRYLATE†

Chemical Identification
CAS #	140-88-5
Formula	C₅H₈O₂
Synonyms	ethyl acrylate (inhibited); ethyl ester of acrylic acid; ethyl propenoate; acrylic acid; ethoxy carbonyl ethylene; 2-propenoic acid; ethyl ester

Physical Properties
Physical description	Colorless liquid with an acrid odor.
Boiling point	211°F	Molecular weight	100.1
Freezing point/melting point	-96°F	Vapor pressure	29 mmHg
Flash point	48°F	Vapor density	3.45
Specific gravity	0.92	Ionization potential	10.30 eV
Lower explosive limit (LEL)	1.4%	Upper explosive limit (UEL)	14%
NFPA health rating	3	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.)	1050
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) coated with 10% t-butylcatechol [SKC 226-73]
Sampling time^*	240 min
Sampling volume (TWA)^*	12 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*	0.75 L
Sampling flow rate (STEL/Peak/C)^*	0.05 L/min
Analytical method instruments	GC-FID
Method reference	OSHA 92 (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	25 ppm (100 mg/m³)	REL-TWA		TLV-TWA	5 ppm [1986]	PEL-TWA	5 ppm (20 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	15 ppm [1986]	PEL-STEL	25 ppm (100 mg/m³)
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	Y	Skin notation	N	Skin notation	N	Skin notation	Y
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION (LOQ 4 ppm). See Appendix A.		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	300 ppm
Carcinogenic classifications: IARC-2B, NIOSH-Ca, TLV-A4		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.01 ppm/30 ppm/300 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Ethyl acrylate, stabilized

NIOSH: Pocket Guide to Chemical Hazards - Ethyl acrylate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Ethyl acrylate. See annual publication for most recent information.
National Toxicology Program: Report on Carcinogens. Scientific Review of Ethyl Acrylate.
No author. Ethyl Acrylate . Report on Carcinogens (latest edition); U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program.
deBethizy, J.D., Udinsky, J.R., Scribner, H.E. and Frederick, C.B.: The disposition and metabolism of acrylic acid and ethyl acrylate in male Sprague-Dawley rats. Fundam. Appl. Toxicol. 8(4): 549-561, 1987.
Kanerva, L., Jolanki, R. and Estlander, T.: 10 years of patch testing with the (meth)acrylate series. Contact Dermatitis 37(6): 255-258, 1997.
McCarthy, T.J. and Witz, G.: Structure-activity relationships in the hydrolysis of acrylate and methacrylate esters by carboxylesterase in vitro. Toxicology 116(1-3): 153-158, 1997.
No authors listed: Ethyl Acrylate. IARC Monogr. Eval. Carcinog. Risks Hum. 71(Pt. 3): 1447-1457, 1999.
Pohanish, R.P. (editor): Ethyl acrylate. Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1043-1044.

Last Updated Date : 12/28/2020

BENZYL ACETATE

Chemical Identification
CAS #	140-11-4
Formula	C₉H₁₀O₂
Synonyms	benzyl ethanoate; acetic acid benzyl ester; phenylmethyl acetate; α-acetoxytoluene; phenylmethyl ethanoate

Physical Properties
Physical description	Colorless liquid with an odor of pears.
Boiling point	419.9°F	Molecular weight	150.18
Freezing point/melting point	-60.7°F	Vapor pressure	1 mmHg at 113°F
Flash point	195°F	Vapor density	5.1
Specific gravity	1.04	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	1	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.)	B508
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) coated with 10% t-butylcatechol [SKC 226-73]
Sampling time^*	100 min
Sampling volume (TWA)^*	10 L
Sampling flow rate (TWA)^*	0.1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	OSHA PV2124 (partially 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		REL-TWA		TLV-TWA	10 ppm [1990]	PEL-TWA	10 ppm (61 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	N	Skin notation	N
Notes: Not established		Notes: Not established		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 - Benzyl acetate

NIOSH: Pocket Guide to Chemical Hazards - Benzyl acetate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Benzyl acetate. See annual publication for most recent information.
NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AF5075000; 1738

Last Updated Date : 12/17/2020

SUBTILISINS

Chemical Identification
CAS #	1395-21-7; 9014-01-1
Formula	Mixture
Synonyms	Bacillus subtilis; Bacillus subtilis BPN; Bacillus subtilis Carlsburg; proteolytic enzymes; Subtilisin BPN; Subtilisin Carlsburg [Note: Commercial proteolytic enzymes are used in laundry detergents.]

Physical Properties
Physical description	Light-colored, free-flowing powders.
Boiling point		Molecular weight	28,000 (approx)
Freezing point/melting point		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.)
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		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL	0.00006 mg/m³ [60 minutes]	TLV-STEL		PEL-STEL	0.00006 mg/m³
PEL-C		REL-C		TLV-C	0.00006 mg/m³ [1972]	PEL-C
Skin notation	NA	Skin notation	N	Skin notation	N	Skin notation	N
Notes: Not established		Notes:		Notes:		Notes: Footnote [r]: Compliance with the subtilisins PEL is assessed by sampling with a high volume sampler (600-800 liters per minute) for at least 60 minutes.
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications:		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 - Subtilisins

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Subtilisins [1395-21-7; 9014-01-1], as 100% crystalline active pure enzyme. See annual publication for most recent information.

Last Updated Date : 01/12/2021

ENFLURANE

Chemical Identification
CAS #	13838-16-9
Formula	CHF₂OCF₂CHClF
Synonyms	2-chloro-1-(difluoromethoxy)-1,1,2-trifluoroethane; 2-chloro-1,1,2-trifluoroethyl difluoromethyl ether; ethrane

Physical Properties
Physical description	Clear, colorless liquid with a mild, sweet odor.
Boiling point	134°F	Molecular weight	184.5
Freezing point/melting point		Vapor pressure	175 mmHg
Flash point		Vapor density
Specific gravity	1.52 at 77°F	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.)	1038	1038
Sampling group
Sampler/Sampling media	Anasorb 747 (140/70 mg) [SKC 226-81A]	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	12 L	10 L
Sampling flow rate (TWA)^*	0.05 L/min	0.1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID	GC-FID
Method reference	OSHA 103 (fully validated)	OSHA 29 (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	Infrared spectrophotometer	Infrared spectrophotometer	Organic vapor analyzer
Model/Type	Miran 1A & 1B	Miran 103
Sampling information (see manufacturer instructions)	0.03 ppm at 8.9 µm	0-10 ppm at 8.7 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		REL-TWA		TLV-TWA	75 ppm [1979]	PEL-TWA	2 ppm (15 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	2 ppm (15.1 mg/m³) [60 minutes]	TLV-C		PEL-C
Skin notation	NA	Skin notation	N	Skin notation	N	Skin notation	N
Notes: Not established		Notes: CEILING IS FOR EXPOSURE TO WASTE ANESTHETIC GASES		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: IARC-3, TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Enflurane

NIOSH: Pocket Guide to Chemical Hazards - Enflurane

Literature References

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

Last Updated Date : 12/28/2020

N-BUTYL LACTATE (BUTYL LACTATE)

Chemical Identification
CAS #	138-22-7
Formula	C₇H₁₄O₃
Synonyms	butyl ester of 2-hydroxypropanoic acid; butyl ester of lactic acid; butyl lactate

Physical Properties
Physical description	Clear, colorless to white liquid with a mild, transient odor.
Boiling point	370°F	Molecular weight	146.2
Freezing point/melting point	-45°F	Vapor pressure	0.4 mmHg
Flash point	160°F	Vapor density	5.04
Specific gravity	0.98	Ionization potential
Lower explosive limit (LEL)	1.15%	Upper explosive limit (UEL)
NFPA health rating	1	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.)	0478
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
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	GC-FID
Method reference	OSHA PV2080 (partially validated)
Notes	Keep samples refrigerated when not in transit. Ship samples overnight with cold-packs as soon as possible.
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	5 ppm (25 mg/m³)	TLV-TWA	5 ppm [1973]	PEL-TWA	5 ppm (25 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: Not established		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Butyl lactate

NIOSH: Pocket Guide to Chemical Hazards - n-Butyl lactate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - n-Butyl lactate. See annual publication for most recent information.
Clary, J.J., Feron, V.J. and van Velthuijsen, J.A.: Safety assessment of lactate esters. Regul. Toxicol. Pharmacol. 27(2): 88-97, 1998.
Pohanish, R.P. (editor): Butyl Lactate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 416-418.
Teeguarden, J.G., et al.: Derivation of a human equivalent concentration for n-butanol using a physiologically based pharmacokinetic model for n-butyl acetate and metabolites n-butanol and n-butyric acid. Toxicol. Sci. 85(1): 429-446, 2005.

Last Updated Date : 01/05/2021

MESITYL OXIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ETHYL ACETATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DICROTOPHOS

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ETHANOLAMINE (2-AMINOETHANOL)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BUTYL ACRYLATE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ETHYL ACRYLATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BENZYL ACETATE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

SUBTILISINS

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ENFLURANE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

N-BUTYL LACTATE (BUTYL LACTATE)

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References