Occupational Safety and Health Administration

1,1-DIMETHYLHYDRAZINE†

Chemical Identification
CAS #	57-14-7
Formula	C₂H₈N₂
Synonyms	dimazine; DMH; UDMH; unsymmetrical dimethylhydrazine

Physical Properties
Physical description	Colorless liquid with an ammonia- or fish-like odor.
Boiling point	147°F	Molecular weight	60.1
Freezing point/melting point	-72°F	Vapor pressure	103 mmHg
Flash point	5°F	Vapor density	1.94
Specific gravity	0.79	Ionization potential	8.05 eV
Lower explosive limit (LEL)	2%	Upper explosive limit (UEL)	95%
NFPA health rating	4	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.)	0940
Sampling group
Sampler/Sampling media	Bubbler (0.1 M hydrochloric acid)
Sampling time^*
Sampling volume (TWA)^*	2-100 L
Sampling flow rate (TWA)^*	0.2-1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	UV-VIS
Method reference	NIOSH 3515 (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	Infrared spectrophotometer
Model/Type	Miran 1A & 1B
Sampling information (see manufacturer instructions)	0.3 ppm@11.2 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	0.5 ppm (1 mg/m³)	REL-TWA		TLV-TWA	0.01 ppm [1993]	PEL-TWA	0.01 ppm (0.025 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.06 ppm (0.15 mg/m³) [120 minutes]	TLV-C		PEL-C
Skin notation	Y	Skin notation	N	Skin notation	Y	Skin notation	Y
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A.		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	15 ppm
Carcinogenic classifications: IARC-2B, NIOSH-Ca, NTP-R, TLV-A3		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - 1,1-Dimethylhydrazine

NIOSH: Pocket Guide to Chemical Hazards - 1,1-Dimethylhydrazine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 1,1-Dimethylhydrazine. See annual publication for most recent information.

Last Updated Date : 01/15/2021

SULFUR PENTAFLUORIDE†

Chemical Identification
CAS #	5714-22-7
Formula	S₂F₁₀
Synonyms	disulfur decafluoride; sulfur decafluoride

Physical Properties
Physical description	Colorless liquid or gas (above 84°F) with an odor like sulfur dioxide.
Boiling point	84°F	Molecular weight	254.1
Freezing point/melting point	-134°F	Vapor pressure	561 mmHg
Flash point		Vapor density	8.77
Specific gravity	2.08 at 32°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.)
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	0.025 ppm (0.25 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.01 ppm (0.1 mg/m³)	TLV-C	0.001 ppm (0.1 mg/m³) [2020]	PEL-C	0.01 ppm (0.1 mg/m³)
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	1 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 - Sulfur pentafluoride

NIOSH: Pocket Guide to Chemical Hazards - Sulfur pentafluoride

Literature References

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

Last Updated Date : 05/18/2022

GLYCERINE (MIST)†

Chemical Identification
CAS #	56-81-5
Formula	C₃H₈O₃
Synonyms	glycerin (anhydrous); glycerol; glycyl alcohol; 1,2,3-propanetriol; trihydroxypropane

Physical Properties
Physical description	Clear, colorless, odorless, syrupy liquid or solid (below 64°F).
Boiling point	554°F (decomposes)	Molecular weight	92.1
Freezing point/melting point	64°F	Vapor pressure	0.003 mmHg at 122°F
Flash point	320°F	Vapor density	3.17
Specific gravity	1.26	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	1	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.)	1363 (total); request using analyte code 9135	G115 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min	240-480 min
Sampling volume (TWA)^*	960 L	816 L
Sampling flow rate (TWA)^*	2 L/min	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric	Gravimetric
Method reference	OSHA PV2121 (partially validated)	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.	If the filter is not overloaded, samples can be collected up to an 8-hour period. 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	15 mg/m³ (total dust), 5 mg/m³ (respirable)	REL-TWA		TLV-TWA	See Appendix B: Particles (insoluble or poorly soluble) Not Otherwise Specified (PNOS)	PEL-TWA	10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)
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: See Appendix D - Substances with No Established RELs.		Notes: Withdrawn in 2013 due to insufficient data relevant to human occupational exposure.		Notes: As PNOR, see also footnote [n], CAL/OSHA PELs.
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 - Glycerine

NIOSH: Pocket Guide to Chemical Hazards - Glycerin (mist)

Literature References

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

Last Updated Date : 12/29/2020

BENZ[A]ANTHRACENE†

Chemical Identification
CAS #	56-55-3
Formula	C₁₈H₁₂
Synonyms	tetraphene; 1,2-benzanthracene; benzanthrene; benzanthracene; benzo[a]anthracene

Physical Properties
Physical description	Colorless leaflets or plates or coarse gold powder with a greenish-yellow fluorescence.
Boiling point	815°F	Molecular weight	228.29
Freezing point/melting point	315-318°F	Vapor pressure
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.)	0350
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	OSHA staff, please contact the SLTC before sampling (801) 233-5100.
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	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	0.2 mg/m³	REL-TWA	0.1 mg/m³ (cyclohexane-extractable fraction)	TLV-TWA	Exposure by all routes should be carefully controlled to levels as low as possible. [1990]	PEL-TWA
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	NA
Notes: As Coal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, pyrene [65966-93-2]. See 29 CFR 1910.1000 Table Z-1 and 29 CFR 1910.1002 Coal tar pitch volatiles; interpretation of term.		Notes: As Coal tar pitch volatiles [65996-93-2]. CARCINOGEN (Ca); See Appendix A and Appendix C - Supplementary Exposure Limits		Notes: BEI®		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: EPA-B2, IARC-2B, NTP-R, TLV-A2, NIOSH-Ca		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Benz[a]anthracene

NIOSH: Pocket Guide to Chemical Hazards - Coal tar pitch volatiles

Literature References

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

Last Updated Date : 01/22/2024

PARATHION†

Chemical Identification
CAS #	56-38-2
Formula	C₁₀H₁₄NO₅PS
Synonyms	O,O-diethyl-O(p-nitrophenyl) phosphorothioate; diethyl parathion; ethyl parathion; parathion-ethyl

Physical Properties
Physical description	Pale-yellow to dark-brown liquid with a garlic-like odor.
Boiling point	707°F	Molecular weight	291.3
Freezing point/melting point	43°F	Vapor pressure	0.00004 mmHg
Flash point	248-320F	Vapor density
Specific gravity	1.27	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	4	NFPA fire rating	1
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.)	1984
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^*	480 min
Sampling volume (TWA)^*	480 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*	15 L
Sampling flow rate (STEL/Peak/C)^*	1 L/min
Analytical method instruments	GC-FPD
Method reference	OSHA 62 (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 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	0.1 mg/m³	REL-TWA	0.05 mg/m³	TLV-TWA	0.05 mg/m³ (inhalable fraction and vapor) [2000]	PEL-TWA	0.1 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	10 mg/m³
Carcinogenic classifications: IARC-3, TLV-A4, EPA-C		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Parathion

NIOSH: Pocket Guide to Chemical Hazards - Parathion

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 2017.
EPA Air Toxics Website: Parathion. U.S. Environmental Protection Agency Technology Transfer Network.
Lee, B.W., London, L., Paulauskis, J., Myers, J. and Christiani, D.C.: Association between human paraoxonase gene polymorphinsm and chronic symptoms in pesticide-exposed workers. J. Occup. Environ. Med. 45(2): 118-122, 2003.
Mutch, E., Daly, A.K., Leathart, J.B.S., Blain, P.G. and Williams, F.M.: Do multiple cytochrome P450 isoforms contribute to parathion metabolism in man? Arch. Toxicol. 77(6): 313-320, 2003.
Pohanish, R.P. (editor): Parathion. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1788-1791.

Last Updated Date : 01/07/2021

METHYL ISOPROPYL KETONE

Chemical Identification
CAS #	563-80-4
Formula	C₅H₁₀O
Synonyms	2-acetyl propane; isopropyl methyl ketone; 3-methyl-2-butanone; 3-methyl butan-2-one; MIPK

Physical Properties
Physical description	Colorless liquid with an acetone-like odor.
Boiling point	201°F	Molecular weight	86.2
Freezing point/melting point	-134°F	Vapor pressure	42 mmHg
Flash point	43°F	Vapor density
Specific gravity	0.81	Ionization potential	9.32 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	1	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.)
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	200 ppm (705 mg/m³)	TLV-TWA	20 ppm [2010]	PEL-TWA
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	NA
Notes: Not established		Notes:		Notes:		Notes: Not established
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 - 3-Methylbutan-2-one

NIOSH: Pocket Guide to Chemical Hazards - Methyl isopropyl ketone

Literature References

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

Last Updated Date : 01/28/2021

ETHION

Chemical Identification
CAS #	563-12-2
Formula	C₉H₂₂O₄P₂S₄
Synonyms	o,o,o',o'-tetraethyl s,s'-methylene di(phosphorodithioate)

Physical Properties
Physical description	Colorless to amber-colored, odorless liquid.
Boiling point	>302°F (decomposes)	Molecular weight	384.48
Freezing point/melting point	9-10°F	Vapor pressure	0.0000015 mmHg
Flash point	349°F	Vapor density
Specific gravity	1.215-1.23	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	0.4 mg/m³	TLV-TWA	0.05 mg/m³ (inhalable fraction and vapor) [2000]	PEL-TWA	0.4 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: 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 - Ethion

NIOSH: Pocket Guide to Chemical Hazards - Ethion

Literature References

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

Last Updated Date : 12/28/2020

ACRIDINE†

Chemical Identification
CAS #	260-94-6
Formula	C₁₃H₉N
Synonyms	benzo[B]quinoline

Physical Properties
Physical description	Small colorless needle-like crystalline solid.
Boiling point	655°F	Molecular weight	179.22
Freezing point/melting point	225-230°F	Vapor pressure	varies depending upon the specific compound
Flash point		Vapor density
Specific gravity	1.2	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.)	A506
Sampling group
Sampler/Sampling media	Coal Tar Pitch Volatiles (CTPV) Sampling Filters and Cassette [SLTC109]
Sampling time^*	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	HPLC
Method reference	OSHA 58 (fully validated)
Notes	OSHA 58 is validated in conjunction with Coal Tar Pitch Volatiles and Coke Oven Emissions. These media are prepared by SLTC as needed and are not available for immediate shipment. Please allow time for SLTC to prepare these media prior to sampling.
Special requirements	After sampling, filter must be transferred to a vial with a Teflon-lined cap. Sample must be protected from direct sunlight.

^* 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	0.2 mg/m³ as Coal tar pitch volatiles (benzene soluble fraction)	REL-TWA	0.1 mg/m³ (cyclohexane-extractable fraction)	TLV-TWA	0.2 mg/m³ [1984]	PEL-TWA	0.2 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: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. See also Appendix C, Supplementary Exposure Limits.		Notes:		Notes: Coal tar pitch volatiles. See footnote [i].
Health factors: See NIH-NLM PubChem.		IDLH	80 mg/m³
Carcinogenic classifications: NIOSH-Ca, TLV-A1		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Acridine

NIOSH: Pocket Guide to Chemical Hazards - Coal tar pitch volatiles

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Coal Tar Pitch Volatiles. See annual publication for most recent information.
Bingham, E., Cohrssen, B., Powell, C.H.: Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. p. 1:773, 2001.
California Occupational Safety & Health Standards Board: Initial and Final Statement of Reasons August 3, 2010.
Jongeneelen, F.: Biological exposure limit for occupational exposure to coal tar pitch volatiles at cokeovens. Int Arch Occup Environ Health. 63(8):511-516, 1992.
NIOSH: Occupational Health Guideline for Coal Tar Pitch Volatiles. 1978
NIOSH/CEC/IPCS: International Chemical Safety Cards - Coal Tar Pitch. March 2002.

Last Updated Date : 01/28/2021

CARBON TETRABROMIDE

Chemical Identification
CAS #	558-13-4
Formula	CBr₄
Synonyms	carbon bromide; methane tetrabromide; tetrabromomethane

Physical Properties
Physical description	Colorless to yellow-brown crystals with a slight odor.
Boiling point	374°F	Molecular weight	331.7
Freezing point/melting point	194°F	Vapor pressure	40 mmHg at 205°F
Flash point		Vapor density
Specific gravity	3.42	Ionization potential	10.31 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.)
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	0.1 ppm (1.4 mg/m³)	TLV-TWA	0.1 ppm [1972]	PEL-TWA	0.1 ppm (1.4 mg/m³)
PEL-STEL		REL-STEL	0.3 ppm (4 mg/m³)	TLV-STEL	0.3 ppm [1972]	PEL-STEL	0.3 ppm (4 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:		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 - Carbon tetrabromide

NIOSH: Pocket Guide to Chemical Hazards - Carbon tetrabromide

Literature References

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

Last Updated Date : 12/21/2020

ZINC STEARATE†

Chemical Identification
CAS #	557-05-1
Formula	Zn(C₁₈H₃₅O₂)₂
Synonyms	dibasic zinc stearate; zinc salt of stearic acid; zinc distearate

Physical Properties
Physical description	Soft, white powder with a slight, characteristic odor.
Boiling point		Molecular weight	632.4
Freezing point/melting point	266°F	Vapor pressure	0 mmHg (approx)
Flash point	530°F (open cup)	Vapor density
Specific gravity	1.10	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.)	2616 (total); request using analyte code 9135	Z104 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min	240-480 min
Sampling volume (TWA)^*	960 L	816 L
Sampling flow rate (TWA)^*	2 L/min	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric	Gravimetric
Method reference	OSHA PV2121 (partially validated)	OSHA PV2121 (partially validated)
Notes	Samples collected for this compound are first analyzed gravimetrically. If the gravimetric result of a sample yields a concentration below the permissible exposure limit (PEL), the SLTC will report the calculated air concentration for the requested compound solely from the gravimetric result, qualified as less than or equal to the gravimetric result; no further work on the sample will be performed. If the gravimetric result indicates an air concentration greater than the PEL, the sample will proceed for elemental analysis. Results will be reported from the elemental analysis for the element only; the stated identity of the actual sample contents is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes. An elemental result provided may be converted to the desired compound by multiplying the result by the appropriate stoichiometric factor. A 91B report specific to the compound (including the stoichiometric conversion) may by be provided upon request by contacting the laboratory. The stoichiometric factor for zinc stearate from zinc is 9.670. The physical form of a sample (dust, mist, or fume) is identified by the compliance officer using available documentation of materials and processes.	Samples collected for this compound are first analyzed gravimetrically. If the gravimetric result of a sample yields a concentration below the permissible exposure limit (PEL), the SLTC will report the calculated air concentration for the requested compound solely from the gravimetric result, qualified as less than or equal to the gravimetric result; no further work on the sample will be performed. If the gravimetric result indicates an air concentration greater than the PEL, the sample will proceed for elemental analysis. Results will be reported from the elemental analysis for the element only; the stated identity of the actual sample contents is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes. An elemental result provided may be converted to the desired compound by multiplying the result by the appropriate stoichiometric factor. A 91B report specific to the compound (including the stoichiometric conversion) may by be provided upon request by contacting the laboratory. The stoichiometric factor for zinc stearate from zinc is 9.670. The standard applies to the Respirable Fraction.
Special requirements	FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!	Samples must be collected with a Dorr-Oliver 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	15 mg/m³ (total dust), 5 mg/m³ (respirable fraction)	REL-TWA	10 mg/m³ (total), 5 mg/m³ (resp)	TLV-TWA	10 mg/m³ (inhalable particulate matter), 3 mg/m³ (respirable particulate matter) [2016]	PEL-TWA	10 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: Does not include stearates of toxic metals.		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 - Zinc stearate

NIOSH: Pocket Guide to Chemical Hazards - Zinc stearate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Stearates(J) [57-11-4; 557-04-0; 557-05-1; 822-16-2]. See annual publication for most recent information.
Kilpikari, I.: Occupational contact dermatitis among rubber workers. Contact Dermatitis 8(6): 359-362, 1982.
Shabaline, L.P. and Spiridonova, V.S.: Toxicity and character of the effect of some zinc compounds. J. Hyg. Epidemiol. Microbiol. Immunol. 32(4): 397-405, 1988.
Ueda, A., Harada, K., Ueda, T. and Nomura, S.: Experimental study on the pathological changes in lung tissue caused by zinc stearate dust. Ind. Health 22(4): 243-253, 1984.

Last Updated Date : 01/14/2021

1,1-DIMETHYLHYDRAZINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

SULFUR PENTAFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

GLYCERINE (MIST)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BENZ[A]ANTHRACENE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PARATHION†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

METHYL ISOPROPYL KETONE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ETHION

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ACRIDINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

CARBON TETRABROMIDE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ZINC STEARATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References