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1,1,1,2-TETRACHLORO-2,2-DIFLUOROETHANE†

Chemical Identification
CAS #	76-11-9
Formula	CCl₃CClF₂
Synonyms	2,2-difluoro-1,1,1,2-tetrachloroethane; Freon(R) 112a; Halocarbon 112a; Refrigerant 112a

Physical Properties
Physical description	Colorless solid with a slight, ether-like odor.
Boiling point	197°F	Molecular weight	203.8
Freezing point/melting point	105°F	Vapor pressure	40 mmHg
Flash point		Vapor density
Specific gravity	1.65	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.)	2337
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	0.5-2 L
Sampling flow rate (TWA)^*	0.01-0.035 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	NIOSH 1016 (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	500 ppm (4170 mg/m³)	REL-TWA	500 ppm (4170 mg/m³)	TLV-TWA	100 ppm [2007]	PEL-TWA	500 ppm (4170 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
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - 1,1,1,2-tetrachloro-2,2-difluoroethane

NIOSH: Pocket Guide to Chemical Hazards - 1,1,1,2-Tetrachloro-2,2-difluoroethane

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 1,1,1,2-Tetrachloro-2,2-difluoroethane. See annual publication for most recent information.

Last Updated Date : 12/19/2018

CHLOROPICRIN (NITROTRICHLOROMETHANE)†

Chemical Identification
CAS #	76-06-2
Formula	CCl₃NO₂
Synonyms	nitrochloroform; nitrotrichloromethane; trichloronitromethane

Physical Properties
Physical description	Colorless to faint-yellow, oily liquid with an intensely irritating odor.
Boiling point	234°F	Molecular weight	164.4
Freezing point/melting point	-93°F	Vapor pressure	18 mmHg
Flash point		Vapor density	5.7
Specific gravity	1.66	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	4	NFPA fire rating	0
NFPA reactivity rating	3	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0675
Sampling group
Sampler/Sampling media	2 XAD-4 tubes in series (80/40 mg) [SKC 226-93]
Sampling time^*	25 min
Sampling volume (TWA)^*	5 L
Sampling flow rate (TWA)^*	0.2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-ECD
Method reference	OSHA PV2103 (partially validated)
Notes	Samples should be protected from light after sampling by covering them with the OSHA-21 form, or an opaque tape, such as masking tape.
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	Available

On-Site Screening Techniques
Device	Detector tube	Infrared spectrophotometer
Model/Type	Gastec 134	Miran 1A & 1B
Sampling information (see manufacturer instructions)	1-60 ppm range	0.1 ppm@11.5 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	0.1 ppm (0.7 mg/m³)	REL-TWA	0.1 ppm (0.7 mg/m³)	TLV-TWA		PEL-TWA	0.1 ppm (0.7 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: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	2 ppm
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.075 ppm/0.15 ppm/1.5 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Chloropicrin

NIOSH: Pocket Guide to Chemical Hazards - Chloropicrin

Literature References

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

Last Updated Date : 05/03/2024

TRICHLOROACETIC ACID

Chemical Identification
CAS #	76-03-9
Formula	C₂HCl₃O₂
Synonyms	TCA; trichloroethanoic acid

Physical Properties
Physical description	Colorless to white, crystalline solid with a sharp, pungent odor.
Boiling point	388°F	Molecular weight	163.39
Freezing point/melting point	136°F	Vapor pressure	1 mmHg at 124°F
Flash point		Vapor density	5.6
Specific gravity	1.62	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.)	T337
Sampling group
Sampler/Sampling media	Silica gel tube (100/50 mg) [SKC 226-47-01]
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	HPLC-UV
Method reference	OSHA PV2017 (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	1 ppm (7 mg/m³)	TLV-TWA	0.5 ppm [2013]	PEL-TWA	1 ppm (5 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: IARC-3, TLV-A3, EPA-C		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Trichloroacetic acid

NIOSH: Pocket Guide to Chemical Hazards - Trichloroacetic acid

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Trichloroacetic acid. See annual publication for most recent information.
Bull R.J., et al.: Contribution of dichloroacetate and trichloroacetate to liver tumor induction in mice by trichloroethylene. Toxicol. Appl. Pharmacol. 182(1): 55-65, 2002.
Calafat, A.M., Kuklenyik, Z., Caudill, S.P. and Ashley, D.L.: Urinary levels of trichloroacetic acid, a disinfection by-product in chlorinated drinking water, in a human reference population. Environ. Health Perspect. 111(2): 151-154, 2003.
Forkert, P.-G., Lash, L., Tardif, R., Tanphaichitr, N., Vandevoort, C. and Moussa, M.: Identification of trichloroethylene and its metabolites in human seminal fluid of workers exposed to trichloroethylene. Drug Metab. Dispos. 31(3): 306-311, 2003.
Pohanish, R.P. (editor): Trichloroacetic Acid. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp.2239-2241.

Last Updated Date : 01/29/2021

2,2-DICHLOROPROPIONIC ACID

Chemical Identification
CAS #	75-99-0
Formula	C₃H₄Cl₂O₂
Synonyms	2-dichloropropionic acid; Basfapon; Basafapon B; Basfapon/N; BH dalapon; Basinex; Crisapon; Davpon; Gramevin; Kenapon; Uropon; Dalapon; Ded-weed; Dowpon Proprop; Radapon; Revenge; Unipon

Physical Properties
Physical description	Colorless liquid with an acrid odor.
Boiling point	374°F	Molecular weight	143.0
Freezing point/melting point	46°F	Vapor pressure	5.07 mmHg at 160°F
Flash point		Vapor density	4.9
Specific gravity	1.40	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.)	D176
Sampling group
Sampler/Sampling media	Silica gel tube (150/75 mg) [SKC 226-10]
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	HPLC-UV
Method reference	OSHA PV2017 (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	1 ppm (6 mg/m³)	TLV-TWA	5 mg/m³ (inhalable particulate matter) [1997]	PEL-TWA	1 ppm (6 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		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - 2,2-Dichloropropionic acid

NIOSH: Pocket Guide to Chemical Hazards - 2,2-Dichloropropionic acid

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 2,2-Dichloropropionic acid. See annual publication for most recent information.

Last Updated Date : 12/15/2020

2,2-DIMETHYLBUTANE

Chemical Identification
CAS #	75-83-2
Formula	C₆H₁₄
Synonyms	diethylmethylmethane; diisopropyl; 2,3-dimethylbutane; isohexane; neohexane

Physical Properties
Physical description	Clear liquids with mild, gasoline-like odors.
Boiling point	121.5°F	Molecular weight	86.18
Freezing point/melting point	-148°F	Vapor pressure	274 mmHg
Flash point	-54°F	Vapor density	3
Specific gravity	0.649	Ionization potential
Lower explosive limit (LEL)	1.2%	Upper explosive limit (UEL)	7%
NFPA health rating	2	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.)
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	See HEXANE ISOMERS, EXCLUDING N-HEXANE
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	100 ppm (350 mg/m³)	TLV-TWA	500 ppm [1979]	PEL-TWA	500 ppm (1800 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	1000 ppm [1979]	PEL-STEL	1000 ppm (3600 mg/m³)
PEL-C		REL-C	510 ppm (1800 mg/m³) [15 minutes]	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 - Neohexane

NIOSH: Pocket Guide to Chemical Hazards - Hexane isomers (excluding n-Hexane)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Hexane isomers, other than n-Hexane. See annual publication for most recent information.

Last Updated Date : 12/15/2020

LITHIUM HYDRIDE†

Chemical Identification
CAS #	7580-67-8
Formula	HLi
Synonyms	lithium monohydride

Physical Properties
Physical description	Odorless, off-white to gray, translucent, crystalline mass or white powder.
Boiling point	decomposes	Molecular weight	7.95
Freezing point/melting point	1256°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	0.78	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	NFPA fire rating	2
NFPA reactivity rating	2	NFPA special instruction	W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	1503
Sampling group
Sampler/Sampling media	Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (25 or 37 mm) [MAWP025A0 or MAWP037A0]
Sampling time^*	240-480 min
Sampling volume (TWA)^*	480-960 L
Sampling flow rate (TWA)^*	2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	AAS/AES
Method reference	OSHA ID-121 (fully validated)
Notes	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 lithium hydride from lithium is 1.145. Analysis for this analyte is based on water solubility.
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 mg/m³	REL-TWA	0.025 mg/m³	TLV-TWA		PEL-TWA	0.025 mg/m³
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C	0.05 mg/m³ (inhalable particulate matter) [2014]	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	0.5 mg/m³
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.025 mg/m³/0.1 mg/m³/3 mg/m³

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Lithium hydride

NIOSH: Pocket Guide to Chemical Hazards - Lithium hydride

Literature References

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

Last Updated Date : 01/04/2021

TETRAMETHYL LEAD (as Pb)†

Chemical Identification
CAS #	75-74-1
Formula	C₄H₁₂Pb
Synonyms	lead tetramethyl; tetramethylplumbane; TML

Physical Properties
Physical description	Colorless liquid (unless dyed red, orange, or blue) with a fruity odor.
Boiling point	230°F at 10 mmHg (decomposes above 212°F)	Molecular weight	267.33
Freezing point/melting point	-17.5°F	Vapor pressure	23 mmHg
Flash point	100°F	Vapor density	6.5
Specific gravity	1.995	Ionization potential	8.50 eV
Lower explosive limit (LEL)	1.8%	Upper explosive limit (UEL)
NFPA health rating	2	NFPA fire rating	3
NFPA reactivity rating	3	NFPA special instruction	W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2370
Sampling group
Sampler/Sampling media	XAD-2 tube (400/200 mg) [SKC 226-30-06]
Sampling time^*
Sampling volume (TWA)^*	15-100 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-PID
Method reference	NIOSH 2534 (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	0.075 mg/m³	REL-TWA	0.075 mg/m³	TLV-TWA	0.15 mg/m³ [1992]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C	0.075 mg/m³ [1992]	PEL-C
Skin notation	Y	Skin notation	Y	Skin notation	Y	Skin notation	Y
Notes: See 29 CFR 1910.1000 Table Z-1. OSHA Construction and Maritime Industry PELs are 0.15 mg/m³. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards.		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	40 mg/m³
Carcinogenic classifications: IARC-3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Tetramethyllead

NIOSH: Pocket Guide to Chemical Hazards - Tetramethyl lead (as Pb)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Tetramethyl lead [75-74-1], as Pb. See annual publication for most recent information.

Last Updated Date : 06/03/2022

DICHLOROACETYLENE†

Chemical Identification
CAS #	7572-29-4
Formula	C₂Cl₂
Synonyms	DCA; dichloroethyne

Physical Properties
Physical description	Volatile oil with a disagreeable, sweetish odor.
Boiling point	90°F (explodes)	Molecular weight	94.9
Freezing point/melting point	-58 to -87°F	Vapor pressure
Flash point		Vapor density
Specific gravity	1.26	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.)	0865
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		TLV-STEL		PEL-STEL
PEL-C	0.1 ppm (0.4 mg/m³) OSHA Construction and Maritime industries only.	REL-C	0.1 ppm (0.4 mg/m³)	TLV-C	0.1 ppm [1992]	PEL-C	0.1 ppm (0.4 mg/m³)
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: The OSHA PEL applies to Construction and Maritime Industries only. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards.		Notes: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A.		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: IARC-3, NIOSH-Ca, TLV-A3		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dichloroacetylene

NIOSH: Pocket Guide to Chemical Hazards - Dichloroacetylene

Literature References

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

Last Updated Date : 06/02/2022

DICHLORODIFLUOROMETHANE†

Chemical Identification
CAS #	75-71-8
Formula	CCl₂F₂
Synonyms	difluorodichloromethane; Fluorocarbon 12; Freon12; Genetron12; Halon122; Propellant 12; Refrigerant 12

Physical Properties
Physical description	Colorless gas with an ether-like odor at extremely high concentrations.
Boiling point	-22°F	Molecular weight	120.9
Freezing point/melting point	-252°F	Vapor pressure	5.7 atm
Flash point		Vapor density	4.2
Specific gravity	1.35 at 59°F	Ionization potential	11.75 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.)	0871
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

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	1000 ppm (4950 mg/m³)	REL-TWA	1000 ppm (4950 mg/m³)	TLV-TWA	1000 ppm [1979]	PEL-TWA	1000 ppm (4950 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C	6200 ppm
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	15000 ppm
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dichlorodifluoromethane

NIOSH: Pocket Guide to Chemical Hazards - Dichlorodifluoromethane

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dichlorodifluoromethane. See annual publication for most recent information.
California Department of Health Services-Drinking Water Program: Drinking Water Notification Levels, 2005.
U.S. EPA Integrated Risk Information System: Dichlorodifluoromethane (CASRN 75-71-8).
Pohanish, R.P. (editor): Dichlorodifluoromethane. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 809-811.

Last Updated Date : 01/22/2024

FLUOROTRICHLOROMETHANE (TRICHLOROFLUOROMETHANE)†

Chemical Identification
CAS #	75-69-4
Formula	CCl₃F
Synonyms	trichlorofluoromethane; Freon 11; monofluorotrichloromethane; Refrigerant 11; trichloromonofluoromethane

Physical Properties
Physical description	Colorless to water-white, nearly odorless liquid or gas (above 75°F).
Boiling point	75°F	Molecular weight	137.4
Freezing point/melting point	-168°F	Vapor pressure	690 mmHg
Flash point		Vapor density	4.74
Specific gravity	1.47	Ionization potential	11.77 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.)	1285
Sampling group
Sampler/Sampling media	CSC tube (400/200 mg) [SKC 226-09]
Sampling time^*
Sampling volume (TWA)^*	0.3-7 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	NIOSH 1006 (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)	1.4 ppm@11 µm	0-100 ppm@10.8 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	1000 ppm (5600 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	1000 ppm (5600 mg/m³)	TLV-C	1000 ppm [1992]	PEL-C	1000 ppm (5600 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	2000 ppm
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Trichlorofluoromethane

NIOSH: Pocket Guide to Chemical Hazards - Fluorotrichloromethane

Literature References

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

Last Updated Date : 01/12/2023

1,1,1,2-TETRACHLORO-2,2-DIFLUOROETHANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

CHLOROPICRIN (NITROTRICHLOROMETHANE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TRICHLOROACETIC ACID

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

2,2-DICHLOROPROPIONIC ACID

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

2,2-DIMETHYLBUTANE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

LITHIUM HYDRIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TETRAMETHYL LEAD (as Pb)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DICHLOROACETYLENE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DICHLORODIFLUOROMETHANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

FLUOROTRICHLOROMETHANE (TRICHLOROFLUOROMETHANE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References