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GRAPHITE (NATURAL), Respirable Fraction†

Chemical Identification
CAS #	7782-42-5
Formula	C
Synonyms	black lead; mineral carbon; plumbago; silver graphite; stove black [Note: Also see specific listing for Graphite (synthetic).]

Physical Properties
Physical description	Steel gray to black, greasy feeling, odorless solid
Boiling point	sublimes	Molecular weight	12
Freezing point/melting point	6602°F (sublimes)	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	2.0-2.25	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.)	9090 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media	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
Sampling volume (TWA)^*	816 L
Sampling flow rate (TWA)^*	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric
Method reference	OSHA PV2121 (partially validated)
Notes	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

^* 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 mppcf	REL-TWA	2.5 mg/m³ (resp)	TLV-TWA	2 mg/m³ (respirable particulate matter) [1988]	PEL-TWA	2.5 mg/m³ (respirable dust)
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-3, Mineral Dusts.		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1250 mg/m³
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Graphite (natural)

NIOSH: Pocket Guide to Chemical Hazards - Graphite (natural)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Graphite (all forms except graphite fibers). See annual publication for most recent information.

Last Updated Date : 12/29/2020

CHLORINE TRIFLUORIDE†

Chemical Identification
CAS #	7790-91-2
Formula	ClF₃
Synonyms	chlorine fluoride; chlorotrifluoride

Physical Properties
Physical description	Colorless gas or a greenish-yellow liquid (below 53°F) with a somewhat sweet, suffocating odor.
Boiling point	53°F	Molecular weight	92.5
Freezing point/melting point	-105°F	Vapor pressure	1.4 atm
Flash point		Vapor density	3.21
Specific gravity	1.85 at 51.8°F	Ionization potential	13.00 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	4	NFPA fire rating	0
NFPA reactivity rating	3	NFPA special instruction	W: Reacts violently or explosively with water. OX: Possesses oxidizing properties.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0615
Sampling group
Sampler/Sampling media	Mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) and filter spacer with Na₂CO₃ impregnated backup pad, in a 3-piece cassette [SKC 225-9001]
Sampling time^*	60 min
Sampling volume (TWA)^*	90 L
Sampling flow rate (TWA)^*	1.5 L/min
Sampling volume (STEL/Peak/C)^*	22.5 L
Sampling flow rate (STEL/Peak/C)^*	1.5 L/min
Analytical method instruments	ICP
Method reference	OSHA ID-110 (fully validated)
Notes	Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period. Hydrogen fluoride is collected on a Na₂CO₃ impregnated backup pad.
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)	REL-C	0.1 ppm (0.4 mg/m³)	TLV-C		PEL-C	0.1 ppm (0.4 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: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	20 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.1 ppm/1 ppm/10 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Chlorine trifluoride

NIOSH: Pocket Guide to Chemical Hazards - Chlorine trifluoride

Literature References

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

Last Updated Date : 04/26/2024

BROMINE PENTAFLUORIDE†

Chemical Identification
CAS #	7789-30-2
Formula	BrF₅
Synonyms	bromine fluoride

Physical Properties
Physical description	Colorless to pale-yellow, fuming liquid with a pungent odor.
Boiling point	105°F	Molecular weight	174.9
Freezing point/melting point	-77°F	Vapor pressure	328 mmHg
Flash point		Vapor density
Specific gravity	2.48	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	W: Reacts violently or explosively with water. OX: Possesses oxidizing properties.
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	0.1 ppm (0.7 mg/m³) [Construction and Maritime only]	REL-TWA	0.1 ppm (0.7 mg/m³)	TLV-TWA	0.1 ppm [1979]	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: General Industry PEL not established. 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
Carcinogenic classifications:		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Bromine pentafluoride

NIOSH: Pocket Guide to Chemical Hazards - Bromine pentafluoride

Literature References

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

Last Updated Date : 07/21/2023

PHOSDRIN (MEVINPHOS)†

Chemical Identification
CAS #	7786-34-7
Formula	C₇H₁₃O₆P
Synonyms	2-carbomethoxy-1-methylvinyl dimethyl phosphate; mevinphos [Note: Commercial product is a mixture of the cis-& trans-isomers.]

Physical Properties
Physical description	Pale-yellow to orange liquid with a weak odor.
Boiling point	223-226°F at 1 mmHg	Molecular weight	224.17
Freezing point/melting point	44.4-70°F (trans-) 70°F (cis-)	Vapor pressure	0.003 mmHg
Flash point	175°F	Vapor density
Specific gravity	0.0029 mmHg at 70°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	0.1 mg/m³	REL-TWA	0.01 ppm (0.1 mg/m³)	TLV-TWA	0.01 mg/m³ (inhalable fraction and vapor) [1998]	PEL-TWA	0.01 ppm (0.1 mg/m³)
PEL-STEL		REL-STEL	0.03 ppm (0.3 mg/m³)	TLV-STEL		PEL-STEL	0.03 ppm (0.3 mg/m³)
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	4 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 - Mevinphos

NIOSH: Pocket Guide to Chemical Hazards - Phosdrin

Literature References

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

Last Updated Date : 01/29/2021

ARSINE†

Chemical Identification
CAS #	7784-42-1
Formula	AsH₃
Synonyms	arsenic hydride; arsenic trihydride; arsenous hydride; hydrogen arsenide

Physical Properties
Physical description	Colorless gas with a mild, garlic-like odor.
Boiling point	-81°F	Molecular weight	78.0
Freezing point/melting point	-179°F	Vapor pressure	14.9 atm at 70°F
Flash point		Vapor density	2.69
Specific gravity	1.689 at 185°F	Ionization potential	9.89 eV
Lower explosive limit (LEL)	5.1%	Upper explosive limit (UEL)	78%
NFPA health rating	4	NFPA fire rating	4
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.)	0270
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	0.1-10 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	AAS-GF
Method reference	NIOSH 6001 (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 arsine from arsenic is 1.040.
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Detector tube	Detector tube	Detector tube	Colorimetric badge
Model/Type	Dräger - Arsine 0.5/a, CH25001	Matheson-Kitagawa 8014-140SA	Matheson-Kitagawa 8014-121U	Gastec 19LA	K&M Enviro Products, SafeAir Arsine monitor, 382030-50
Sampling information (see manufacturer instructions)	20 strokes, approx 0.03-3 ppm range, uncertainty 25-33%	follow mfr instructions, approx 5-160 ppm range	follow mfr instructions, approx 0.05-2 ppm range	1-10 strokes, 0.02-10 ppm range, uncertainty 16.4% for 0.1 to 0.5 ppm, 8.2% for 0.5 to 1.5 ppm	0.25-12 hr exposure, 2.25 ppb for 8 hr exposure-4 ppm for 15 min exposure

**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	0.05 ppm (0.2 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA	0.05 ppm (0.2 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.002 mg/m³ [15 minute]	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.		Notes: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	3 ppm
Carcinogenic classifications: NIOSH-Ca		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: --/0.5 ppm/1.5 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Arsine

NIOSH: Pocket Guide to Chemical Hazards - Arsine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Arsine. See annual publication for most recent information.
Klimecki, W.T. and Carter, D.E.: Arsine toxicity: chemical and mechanistic implications. J. Toxicol. Environ. Health 46 : 399-409, 1995.

Last Updated Date : 04/03/2024

SELENIUM HEXAFLUORIDE†

Chemical Identification
CAS #	7783-79-1
Formula	F₆Se
Synonyms	selenium fluoride

Physical Properties
Physical description	Colorless gas.
Boiling point	-30°F	Molecular weight	193
Freezing point/melting point	-59°F	Vapor pressure	>1 atm
Flash point		Vapor density	6.66
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	0.05 ppm (0.4 mg/m³)	REL-TWA	0.05 ppm	TLV-TWA	0.05 ppm [1992]	PEL-TWA	0.05 ppm (0.4 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	2 ppm
Carcinogenic classifications: IARC-3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Selenium hexafluoride

NIOSH: Pocket Guide to Chemical Hazards - Selenium hexafluoride

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Selenium hexafluoride [7783-79-1], as Se. See annual publication for most recent information.

Last Updated Date : 01/11/2021

SULFUR TETRAFLUORIDE

Chemical Identification
CAS #	7783-60-0
Formula	F₄S
Synonyms	tetrafluorosulfurane

Physical Properties
Physical description	Colorless gas with a distinct sulfur odor.
Boiling point	-41°F	Molecular weight	108.06
Freezing point/melting point	-185°F	Vapor pressure	10.5 atm at 70°F
Flash point		Vapor density	3.78
Specific gravity	1.95 at -108°F	Ionization potential	12.63 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.)	2322
Sampling group
Sampler/Sampling media	Mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) and filter spacer with Na₂CO₃ impregnated backup pad, in a 3-piece cassette [SKC 225-9001]
Sampling time^*	60 min
Sampling volume (TWA)^*	90 L
Sampling flow rate (TWA)^*	1.5 L/min
Sampling volume (STEL/Peak/C)^*	22.5 L
Sampling flow rate (STEL/Peak/C)^*	1.5 L/min
Analytical method instruments	ICP
Method reference	OSHA ID-110 (fully validated)
Notes	Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period. Hydrogen fluoride is collected on a Na₂CO₃ impregnated backup pad.
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		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	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 - Sulfur tetrafluoride

NIOSH: Pocket Guide to Chemical Hazards - Sulfur tetrafluoride

Literature References

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

Last Updated Date : 01/12/2021

NITROGEN TRIFLUORIDE†

Chemical Identification
CAS #	7783-54-2
Formula	F₃N
Synonyms	nitrogen fluoride; trifluoramine; trifluorammonia

Physical Properties
Physical description	Colorless gas with a moldy odor.
Boiling point	-200°F	Molecular weight	71
Freezing point/melting point	-343.8°F	Vapor pressure	>1 atm
Flash point		Vapor density	2.902
Specific gravity		Ionization potential	12.97 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.)	1907
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	Infrared spectrophotometer	Infrared spectrophotometer
Model/Type	Miran 1A & 1B	Miran 103
Sampling information (see manufacturer instructions)	0.05 ppm@11 µm	0-20 ppm@11 µm

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	10 ppm (29 mg/m³)	REL-TWA	10 ppm (29 mg/m³)	TLV-TWA	10 ppm [1992]	PEL-TWA	10 ppm (29 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1000 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 200 ppm/400 ppm/800 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Nitrogen trifluoride

NIOSH: Pocket Guide to Chemical Hazards - Nitrogen trifluoride

Literature References

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

Last Updated Date : 01/05/2021

OXYGEN DIFLUORIDE†

Chemical Identification
CAS #	7783-41-7
Formula	F₂O
Synonyms	difluorine monoxide; fluorine monoxide; oxygen fluoride

Physical Properties
Physical description	Colorless, poisonous gas with a peculiar, foul odor.
Boiling point	-230°F	Molecular weight	54
Freezing point/melting point	-371°F	Vapor pressure	>1 atm
Flash point		Vapor density	1.88
Specific gravity		Ionization potential	13.11 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	0.05 ppm (0.1 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.05 ppm (0.1 mg/m³)	TLV-C	0.005 ppm [1983]	PEL-C	0.05 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	0.5 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 - Oxygen difluoride

NIOSH: Pocket Guide to Chemical Hazards - Oxygen difluoride

Literature References

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

Last Updated Date : 01/07/2021

HYDROGEN SELENIDE†

Chemical Identification
CAS #	7783-07-5
Formula	H₂Se
Synonyms	selenium dihydride; selenium hydride

Physical Properties
Physical description	Colorless gas with an odor resembling decayed horseradish.
Boiling point	-42°F	Molecular weight	80.98
Freezing point/melting point	-87°F	Vapor pressure	9.5 atm at 70°F
Flash point		Vapor density	2.12 at -43.6°F
Specific gravity		Ionization potential	9.88 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.)	1475
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	Please see SELENIUM & COMPOUNDS.
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
Model/Type	Matheson-Kitagawa 8014-167S
Sampling information (see manufacturer instructions)	follow mfr instructions, 1-600 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	0.05 ppm (0.2 mg/m³)	REL-TWA	0.05 ppm (0.2 mg/m³)	TLV-TWA	0.05 ppm [1990]	PEL-TWA	0.05 ppm (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:		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: --/0.2 ppm/2 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Hydrogen selenide, anhydrous

NIOSH: Pocket Guide to Chemical Hazards - Hydrogen selenide

Literature References

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

Last Updated Date : 12/31/2020

GRAPHITE (NATURAL), Respirable Fraction†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

CHLORINE TRIFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BROMINE PENTAFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PHOSDRIN (MEVINPHOS)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ARSINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

SELENIUM HEXAFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

SULFUR TETRAFLUORIDE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

NITROGEN TRIFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

OXYGEN DIFLUORIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

HYDROGEN SELENIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References