Occupational Safety and Health Administration

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

TERT-BUTYL ALCOHOL (TERT-BUTANOL)†

Chemical Identification
CAS #	75-65-0
Formula	C₄H₁₀O
Synonyms	2-methyl-2-propanol; trimethylcarbinol; TBA

Physical Properties
Physical description	Colorless solid or liquid (above 77°F) with a camphor-like odor.
Boiling point	180°F	Molecular weight	74.14
Freezing point/melting point	78°F	Vapor pressure	42 mmHg at 77°F
Flash point	52°F	Vapor density	2.55
Specific gravity	0.78 at 78.8°F	Ionization potential	9.70 eV
Lower explosive limit (LEL)	2.4%	Upper explosive limit (UEL)	8%
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.)	0462
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	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	GC-FID
Method reference	NIOSH 1400 (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	Detector tube
Model/Type	Gastec 102L
Sampling information (see manufacturer instructions)	2 strokes, approx 0.05-1.2% range

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	100 ppm (300 mg/m³)	REL-TWA	100 ppm (300 mg/m³)	TLV-TWA		PEL-TWA	100 ppm (300 mg/m³)
PEL-STEL		REL-STEL	150 ppm (450 mg/m³)	TLV-STEL		PEL-STEL	150 ppm (450 mg/m³)
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1600 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 - Tert-Butyl alcohol

NIOSH: Pocket Guide to Chemical Hazards - tert-Butyl alcohol

Literature References

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

Last Updated Date : 04/05/2024

TRIFLUOROBROMOMETHANE†

Chemical Identification
CAS #	75-63-8
Formula	CBrF₃
Synonyms	bromotrifluoromethane; Fluorocarbon 1301; Freon13B1; Halocarbon 13B1; Halon1301; monobromotrifluoromethane; Refrigerant 13B1; trifluoromonobromomethane

Physical Properties
Physical description	Colorless, odorless gas.
Boiling point	-72°F	Molecular weight	148.9
Freezing point/melting point	-267°F	Vapor pressure	>1 atm
Flash point		Vapor density	5.14
Specific gravity		Ionization potential	11.78 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.)	2500
Sampling group
Sampler/Sampling media	2 CSC tubes in series (first tube 400/200 mg, second tube 100/50 mg) [SKC 226-09 & SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	0.1-1 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 1017 (partially validated)
Notes	Separate front and back tubes; ship on dry ice.
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 (6100 mg/m³)	REL-TWA	1000 ppm (6100 mg/m³)	TLV-TWA	1000 ppm [1979]	PEL-TWA	1000 ppm (6100 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	40,000 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Bromotrifluoromethane

NIOSH: Pocket Guide to Chemical Hazards - Trifluorobromomethane

Literature References

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

Last Updated Date : 01/12/2023

DIFLUORODIBROMOMETHANE†

Chemical Identification
CAS #	75-61-6
Formula	CBr₂F₂
Synonyms	dibromodifluoromethane; Freon12B2; Halon1202

Physical Properties
Physical description	Colorless, heavy liquid or gas (above 76°F) with a characteristic odor.
Boiling point	76°F	Molecular weight	209.8
Freezing point/melting point	-231°F	Vapor pressure	620 mmHg
Flash point		Vapor density
Specific gravity	2.29 at 59°	Ionization potential	11.07 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.)	0922
Sampling group
Sampler/Sampling media	2 CSC tubes (100/50 mg sections, 20/40 mesh) in series [SKC 226-01]
Sampling time^*
Sampling volume (TWA)^*	2.5-10 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	GC-FID
Method reference	NIOSH 1012 (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
Model/Type	Miran 1A & 1B
Sampling information (see manufacturer instructions)	0.04 ppm@9.2 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	100 ppm (860 mg/m³)	REL-TWA	100 ppm (860 mg/m³)	TLV-TWA	100 ppm [1962]	PEL-TWA	100 ppm (860 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	2000 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dibromodifluoromethane

NIOSH: Pocket Guide to Chemical Hazards - Difluorodibromomethane

Literature References

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

Last Updated Date : 12/28/2020

PROPYLENE OXIDE (1,2-EPOXYPROPANE)†

Chemical Identification
CAS #	75-56-9
Formula	C₃H₆O
Synonyms	1,2-epoxy propane; methyl ethylene oxide; methyloxirane; propene oxide; 1,2-propylene oxide

Physical Properties
Physical description	Colorless liquid with a benzene-like odor.
Boiling point	93.61°F	Molecular weight	58.08
Freezing point/melting point	-170°F	Vapor pressure	445 mmHg
Flash point	-35°F	Vapor density	2
Specific gravity	0.859 at 32°F	Ionization potential	9.81 eV
Lower explosive limit (LEL)	2.8%	Upper explosive limit (UEL)	37%
NFPA health rating	3	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.)	2215
Sampling group
Sampler/Sampling media	Anasorb 747 (140/70 mg) [SKC 226-81A]
Sampling time^*
Sampling volume (TWA)^*	5 L
Sampling flow rate (TWA)^*	0.1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	OSHA 88 (fully validated)
Notes
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Detector tube
Model/Type	Gastec 163	Matheson-Kitagawa 8014-163SA
Sampling information (see manufacturer instructions)	1 stroke, approx 0.03-3.9% range, uncertainty 25% for 0.06-1.3%, 16% for 1.3-3.9%	0.5 or 1 stroke, approx 0.05-5% range

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	100 ppm (240 mg/m³)	REL-TWA		TLV-TWA	2 ppm [2000]	PEL-TWA	2 ppm (4.75 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 (LOQ 8.4 ppm). See Appendix A, NIOSH Potential Occupational Carcinogens.		Notes: dermal sensitization (DSEN)		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	400 ppm
Carcinogenic classifications: IARC-2B, NIOSH-Ca, NTP-R, TLV-A3, EPA-B2		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 50 ppm/250 ppm/750 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Propylene oxide

NIOSH: Pocket Guide to Chemical Hazards - Propylene oxide

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Propylene oxide. See annual publication for most recent information.
Czene, K., et al.: Analysis of DNA and hemoglobin adducts and sister chromatid exchanges in a human population occupationally exposed to propylene oxide: a pilot study. Cancer Epidemiol. Biomarkers Prev. 11(3): 315-318, 2002.
Faller, T.H., Csanady, G.A., Kreuzer, P.E., Bauer, C.M. and Filser, J.G.: Kinetics of propylene oxide metabolism in microsomes and cytosol of different organs from mouse, rat, and humans. Toxicol. Appl. Pharmacol. 172(1): 62-74, 2001.
Pohanish, R.P. (editor): Propylene Oxide. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1978-1980.

Last Updated Date : 01/11/2021

PROPYLENE IMINE†

Chemical Identification
CAS #	75-55-8
Formula	C₃H₇N
Synonyms	2-methylaziridine; 2-methylethyleneimine; propyleneimine; propylene imine (inhibited); propylenimine

Physical Properties
Physical description	Colorless, oily liquid with an ammonia-like odor.
Boiling point	152°F	Molecular weight	57.11
Freezing point/melting point	-85°F	Vapor pressure	112 mmHg
Flash point	25°F	Vapor density	2
Specific gravity	0.8039-0.807 at 77°F	Ionization potential	9.00 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	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
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	Gastec 180
Sampling information (see manufacturer instructions)	1-60 ppm range

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	2 ppm (5 mg/m³)	REL-TWA	2 ppm (5 mg/m³)	TLV-TWA	0.2 ppm [2008]	PEL-TWA	2 ppm (5 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	0.4 ppm [2008]	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: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens.		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	100 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 - Propyleneimine, stabilized

NIOSH: Pocket Guide to Chemical Hazards - Propylene imine

Literature References

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

Last Updated Date : 01/11/2021

IODINE†

Chemical Identification
CAS #	7553-56-2
Formula	I₂
Synonyms	iodine crystals; molecular iodine

Physical Properties
Physical description	Violet-black crystals with metallic luster and a sharp, characteristic odor.
Boiling point	365°F	Molecular weight	253.8
Freezing point/melting point	236°F	Vapor pressure	0.3 mmHg at 77°F
Flash point		Vapor density
Specific gravity	4.93	Ionization potential	9.31 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.)	1515
Sampling group
Sampler/Sampling media	sampling glass tubes packed with 100 mg IABC front and 50 mg backup sections [SKC 226-80 or equivalent]
Sampling time^*	5 min
Sampling volume (TWA)^*	2-5 L
Sampling flow rate (TWA)^*	0.5 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	ISE
Method reference	OSHA ID-212 (fully validated)
Notes	Humidity at the sampling site needs to be assessed prior to the actual sampling. FOR OSHA CSHOs ONLY: If it is anticipated to be greater then 50%, please contact the SLTC for further instructions. Submit as separate sample. When the analysis of this compound is requested, analysis for Iodide is performed and reported as Iodine.
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	OSHA STAFF CONTACT SLTC FOR MEDIA
Bulk Method

On-Site Screening Techniques
Device	Detector tube	Detector tube
Model/Type	Gastec 9L	Gastec 80
Sampling information (see manufacturer instructions)	1-2 strokes, 0.04-12 ppm range, uncertainty 16% for 0.2-1.2 ppm, 8% for 1.2-12 ppm	1-4 strokes, approx 0.3-48 ppm range, uncertainty 16%

**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	0.01 ppm (inhalable fraction and vapor) [2007]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL	0.1 ppm (vapor fraction) [2007]	PEL-STEL
PEL-C	0.1 ppm (1 mg/m³)	REL-C	0.1 ppm (1 mg/m³)	TLV-C		PEL-C	0.1 ppm (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	2 ppm
Carcinogenic classifications: TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: 0.1 ppm/0.5 ppm/5 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Iodine

NIOSH: Pocket Guide to Chemical Hazards - Iodine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Iodine and Iodides. See annual publication for most recent information.
International Chemical Safety Cards (WHO/IPCS/ILO): Iodine.
Backer, H. and Hallowell, J.: Use of iodine for water disinfection: iodine toxicity and maximum recommended dose. Environ. Health Perspect. 108(8): 679-684, 2000.
Pohanish, R.P. (editor): Iodine. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1305-1306.

Last Updated Date : 01/29/2021

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

TERT-BUTYL ALCOHOL (TERT-BUTANOL)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TRIFLUOROBROMOMETHANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DIFLUORODIBROMOMETHANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PROPYLENE OXIDE (1,2-EPOXYPROPANE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PROPYLENE IMINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

IODINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References