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CHLORODIPHENYL, 42% CHLORINE (PCB)†

Chemical Identification
CAS #	53469-21-9
Formula	C₆H₄ClC₆H₃Cl₂ (approx)
Synonyms	Aroclor1242; PCB; polychlorinated biphenyl

Physical Properties
Physical description	Colorless to light-colored, viscous liquid with a mild, hydrocarbon odor.
Boiling point	617-691°F	Molecular weight	258 (approx)
Freezing point/melting point	-2°F	Vapor pressure	0.001 mmHg
Flash point	>286°F	Vapor density
Specific gravity	1.3-1.8	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	2	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.)	0630
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^*	60 min
Sampling volume (TWA)^*	60 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-ECD
Method reference	OSHA PV2089 (partially validated)
Notes	Collect a sample of the bulk substance and send to the lab in a separate mailing container at the time the air samples are submitted. Indicate on the sample sheet that a bulk sample has been submitted.
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	1 mg/m³	REL-TWA	0.001 mg/m³	TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	Y	Skin notation	N	Skin notation	Y	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.		Notes: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	5 mg/m³
Carcinogenic classifications: 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 - Polychlorinated biphenyls (PCB)

NIOSH: Pocket Guide to Chemical Hazards - Chlorodiphenyl (42% chlorine)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Chlorodiphenyl (42% chlorine). See annual publication for most recent information.
Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.

Last Updated Date : 05/01/2024

α-CHLOROACETOPHENONE (PHENACYL CHLORIDE; 2-CHLOROACETOPHENONE)†

Chemical Identification
CAS #	532-27-4
Formula	C₈H₇ClO
Synonyms	chloromethyl phenyl ketone; mace; phenacylchloride; phenyl chloromethyl ketone; tear gas

Physical Properties
Physical description	Colorless to gray crystalline solid with a sharp, irritating odor.
Boiling point	472°F	Molecular weight	154.6
Freezing point/melting point	134°F	Vapor pressure	0.005 mmHg
Flash point	244°F	Vapor density	5.2
Specific gravity	1.32	Ionization potential	9.44 eV
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	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.)	0618
Sampling group
Sampler/Sampling media	Silica gel tube (150/75 mg) [SKC 226-10]
Sampling time^*	100 min
Sampling volume (TWA)^*	10 L
Sampling flow rate (TWA)^*	0.1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	HPLC-UV
Method reference	OSHA PV2182 (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	0.05 ppm (0.3 mg/m³)	REL-TWA	0.3 mg/m³ (0.05 ppm)	TLV-TWA		PEL-TWA	0.05 ppm (0.3 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
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-Chloroacetophenone

NIOSH: Pocket Guide to Chemical Hazards - ⍺-Chloroacetophenone

Literature References

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

Last Updated Date : 04/30/2024

DINITROBENZENES, ALL ISOMERS†

Chemical Identification
CAS #	25154-54-5
Formula	C₆H₄N₂O₄
Synonyms	(o-, m-, p-)dinitrobenzene; (1,2-, 1,3-, 1,4-)dinitrobenzene

Physical Properties
Physical description	Pale-white or yellow crystalline solid.
Boiling point	See individual isomers for properties	Molecular weight
Freezing point/melting point		Vapor pressure
Flash point		Vapor density
Specific gravity		Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	NFPA fire rating	1
NFPA reactivity rating	4	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	Detector tube	Detector tubes	Detector tubes	Infrared spectrophotometers
Model/Type	Gastec 1L	Gastec 1LA	Dräger - 6733051, CH25601, CH20601	Matheson-Kitagawa 8014-100, 8014-106S, 8014-106SA	Miran 1A & 1B; Miran 103
Sampling information (see manufacturer instructions)	10-2000 ppm range	8-1000 ppm range	6733051: 2-300 ppm range; CH25601: 5-700 ppm range; CH20601: 10-3000 ppm range	100: 5-1000 ppm range; 106S: 10-250 ppm range; 106SA: 5-1000 ppm range	Miran 1A & 1B: 2.1 ppm@4.7 µm; Miran 103: 0-100 ppm@4.61 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	1 mg/m³	REL-TWA	1 mg/m³	TLV-TWA	0.15 ppm (inhalable fraction and vapor) [1979]	PEL-TWA	0.15 ppm (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	50 mg/m³
Carcinogenic classifications: EPA-D		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dinitrobenzenes

NIOSH: Pocket Guide to Chemical Hazards - o-Dinitrobenzene

Literature References

NIOSH: Pocket Guide to Chemical Hazards - m-Dinitrobenzene, p-Dinitrobenzene.
ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dinitrobenzene, all isomers. See annual publication for most recent information.

Last Updated Date : 12/28/2020

TRICHLORPHON

Chemical Identification
CAS #	52-68-6
Formula	C₄H₈Cl₃O₄P
Synonyms	(2,2,2-trichloro-1-hydroxyethyl) dimethylphosphonate; (2,2,2-trichloro-1-hydroxyethyl) phosphonic acid dimethyl ester

Physical Properties
Physical description	White crystalline solid.
Boiling point	212°F at 0.1 mmHg	Molecular weight	257.44
Freezing point/melting point	181-183°F	Vapor pressure	7.8x10-6
Flash point		Vapor density
Specific gravity	1.73	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA		TLV-TWA	1 mg/m³ (inhalable particulate matter) [2003]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	N	Skin notation	NA
Notes: Not established		Notes: Not established		Notes: BEI®		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: TLV-A4, IARC-3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Trichlorfon

NIOSH: Pocket Guide to Chemical Hazards - Trichlorfon

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Trichlorphon. See annual publication for most recent information.
Cukurcam, S., Sun, F., Betzendahl, I., Adler, I.D. and Eichenlaub-Ritter, U.: Trichlorfon predisposes to aneuploidy and interferes with spindle formatin in in vitro maturing mouse oocytes. Mutat. Res. 564(2): 165-178, 2004.
Czeizel, A.E., et al.: Environmental trichlorfon and cluster of congenital abnormalities. Lancet 341(8844): 539-542, 1993.
Dingemanse, J., Halabi, A., Kleinbloesem, C.H., Heinig, R. and Blume, H.: Pharmacokinetics and pharmacodynamics of the acetylcholinesterase inhibitor metrifonate in patients with renal impairment. Ther. Drug Monit. 21(3): 310-316, 1999.
Hu, X.H., Lu, Y.P., Xue, S.Z., Ling, Y.X. and Gu, X.Q.: Toxicity of dipterex: a field study. Br. J. Ind. Med. 43(6): 414-419, 1986.
King, C.H., et al.: Chemotherapy-based control of schistosomiasis haematobia. I. Metrifonate versus praziquantel in control of intensity and prevalence of infection. Am. J. Trop. Med. Hyg. 39(3): 295-305, 1988.
Pohanish, R.P. (editor): Trichlorfon. Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 2237-2239.
Vasilescu, C., Alexianu, M. and Dan, A.: Delayed neuropathy after organophosphorus insecticide (Dipterex) poisoning: a clinical, electrophysiological and nerve biopsy study. J. Neurol. Neurosurg. Psychiatry 47(5): 543-548, 1984.

Last Updated Date : 01/13/2021

METHYLENE BIS(4-CYCLOHEXYLISOCYANATE)

Chemical Identification
CAS #	5124-30-1
Formula	C₁₅H₂₂N₂O₂
Synonyms	dicyclohexylmethane 4,4'-diisocyanate; DMDI; bis(4-isocyanatocyclohexyl)methane; HMDI; hydrogenated MDI; reduced MDI; saturated MDI; 1,1-methylene bis(4-isocyanatocyclohexane)

Physical Properties
Physical description	Clear, colorless to light-yellow liquid.
Boiling point		Molecular weight	262.4
Freezing point/melting point	<14°F	Vapor pressure	0.001 mmHg at 77°F
Flash point	>395°F	Vapor density
Specific gravity	1.07 at 77°F	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2651
Sampling group
Sampler/Sampling media	Isocyanate Sampling Filter Kit - GFF (37 mm, open-faced) coated with 1 mg 1-(2-pyridyl)piperazine [SLTC103]
Sampling time^*	15 min
Sampling volume (TWA)^*	15 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	UHPLC
Method reference	OSHA 5002 (fully validated)
Notes	Refrigerate coated filters until used. Sample open-faced!!
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	Hazard Assessment Test Kit for Aliphatic Isocyanates
Model/Type	769-1003
Sampling information (see manufacturer instructions)	Isocyanate Surface and Dermal Sampling, Hazard Assessment Test Kit for Aliphatic Isocyanates

**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	0.005 ppm [1985]	PEL-TWA	0.005 ppm (0.054 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.01 ppm (0.11 mg/m³)	TLV-C		PEL-C
Skin notation	NA	Skin notation	N	Skin notation	N	Skin notation	N
Notes: Not established		Notes:		Notes:		Notes: See also Section 5198.
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-Methylene bis(4-isocyanatocyclohexane)

NIOSH: Pocket Guide to Chemical Hazards - Methylene bis(4-cyclohexylisocyanate)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methylene bis(4-cyclohexylisocyanate). See annual publication for most recent information.

Last Updated Date : 04/02/2025

TETRANITROMETHANE†

Chemical Identification
CAS #	509-14-8
Formula	CN₄O₈
Synonyms	Tetan; TNM

Physical Properties
Physical description	Colorless to pale-yellow liquid or solid (below 57°F) with a pungent odor.
Boiling point	259°F	Molecular weight	196.04
Freezing point/melting point	57.6°F	Vapor pressure	8 mmHg
Flash point	>235°F	Vapor density	6.8
Specific gravity	1.638	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	4	NFPA fire rating	0
NFPA reactivity rating	4	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	2395
Sampling group
Sampler/Sampling media	Impinger containing 15 mL ethyl acetate [Infrequently Requested Method – OSHA personnel Contact SLTC before sampling 801-233-5100]
Sampling time^*
Sampling volume (TWA)^*	20-250 L
Sampling flow rate (TWA)^*	0.5-1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-NPD
Method reference	NIOSH 3513 (fully validated)
Notes	refrigeration recommended
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	1 ppm (8 mg/m³)	REL-TWA	1 ppm (8 mg/m³)	TLV-TWA	0.005 ppm [1992]	PEL-TWA	0.005 ppm (0.04 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	4 ppm
Carcinogenic classifications: IARC-2B, NTP-R, TLV-A3		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Tetranitromethane

NIOSH: Pocket Guide to Chemical Hazards - Tetranitromethane

Literature References

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

Last Updated Date : 01/22/2024

ACETYLSALICYLIC ACID

Chemical Identification
CAS #	50-78-2
Formula	C₉H₈O₄
Synonyms	acetal; o-acetoxybenzoic acid; 2-acetoxybenzoic acid; aspirin

Physical Properties
Physical description	Odorless, colorless to white, crystal-line powder.
Boiling point	284°F (decomposes)	Molecular weight	180.2
Freezing point/melting point	275°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	1.35	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	5 mg/m³	TLV-TWA	5 mg/m³ [1977]	PEL-TWA	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: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Acetylsalicylic acid

NIOSH: Pocket Guide to Chemical Hazards - Acetylsalicylic acid

Literature References

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

Last Updated Date : 12/15/2020

CYANOGEN CHLORIDE

Chemical Identification
CAS #	506-77-4
Formula	CNCl
Synonyms	chlorcyan; chlorine cyanide; chlorocyanide; chlorocyanogen; cyanogen chloride inhibited

Physical Properties
Physical description	Colorless gas or liquid (below 55°F) with an irritating odor.
Boiling point	55°F	Molecular weight	61.5
Freezing point/melting point	20°F	Vapor pressure	1010 mmHg
Flash point		Vapor density	2.16
Specific gravity	1.22 (liquid at 32°F)	Ionization potential	12.49 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.)	C146
Sampling group
Sampler/Sampling media	XAD-2 tube (450/225 mg) coated with 10% 2-(hydroxymethyl)piperidine [SKC 226-27]
Sampling time^*	120 min
Sampling volume (TWA)^*	24 L
Sampling flow rate (TWA)^*	0.2 L/min
Sampling volume (STEL/Peak/C)^*	3 L
Sampling flow rate (STEL/Peak/C)^*	0.2 L/min
Analytical method instruments	GC-NPD
Method reference	OSHA PV2193 (partially validated)
Notes
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.3 ppm (0.6 mg/m³)	TLV-C	0.3 ppm [2013]	PEL-C	0.3 ppm (0.6 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: --/0.5 ppm/4 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Cyanogen chloride, stabilized

NIOSH: Pocket Guide to Chemical Hazards - Cyanogen chloride

Literature References

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

Last Updated Date : 12/22/2020

BIS-(2-CHLOROETHYL)SULFIDE

Chemical Identification
CAS #	505-60-2
Formula	C₄H₈Cl₂S
Synonyms	HD; 2-2-dichlorodiethyl-sulfide; mustard gas

Physical Properties
Physical description	Clear amber-colored oily liquid, with a faint odor of mustard/garlic.
Boiling point	419-423°F	Molecular weight	159.08
Freezing point/melting point	55-57°F	Vapor pressure	0.09 mmHg at 86°F
Flash point	221°F	Vapor density	5.4
Specific gravity	1.274	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	NA	Skin notation	NA
Notes: Not established		Notes: Not established		Notes: Not established		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: IARC-1,NTP-K		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Mustard gas

NIOSH: Pocket Guide to Chemical Hazards - Mustard gas

Literature References

Last Updated Date : 12/17/2020

2-AMINOPYRIDINE†

Chemical Identification
CAS #	504-29-0
Formula	C₅H₆N₂
Synonyms	α-aminopyridine; α-pyridylamine

Physical Properties
Physical description	White powder, leaflets, or crystals with a characteristic odor.
Boiling point	411°F	Molecular weight	94.1
Freezing point/melting point	137°F	Vapor pressure	0.8 mmHg at 77°F
Flash point	198°F	Vapor density
Specific gravity		Ionization potential	8.00 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.)	0165
Sampling group
Sampler/Sampling media	2 GFFs (37 mm) coated with sulfuric acid, in 3-piece cassette, separated by the ring section [SKC 225-9004]
Sampling time^*	240 min
Sampling volume (TWA)^*	240 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-NPD
Method reference	OSHA PV2143 (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	0.5 ppm (2 mg/m³)	REL-TWA	0.5 ppm (2 mg/m³)	TLV-TWA		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	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	5 ppm
Carcinogenic classifications:		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - 2-Aminopyridine

NIOSH: Pocket Guide to Chemical Hazards - 2-Aminopyridine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 2-Aminopyridine. See annual publication for most recent information.
NIOSH: The Registry of Toxic Effects of Chemical Substances: Pyridine, 1-amino- (RTECS #: US1575000).
International Chemical Safety Cards (WHO/IPCS/ILO): 2-Aminopyridine.
Pohanish, R.P. (editor): 2-Aminopyridine. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 140-141.

Last Updated Date : 03/28/2023

CHLORODIPHENYL, 42% CHLORINE (PCB)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

α-CHLOROACETOPHENONE (PHENACYL CHLORIDE; 2-CHLOROACETOPHENONE)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DINITROBENZENES, ALL ISOMERS†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TRICHLORPHON

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

METHYLENE BIS(4-CYCLOHEXYLISOCYANATE)

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TETRANITROMETHANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ACETYLSALICYLIC ACID

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

CYANOGEN CHLORIDE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BIS-(2-CHLOROETHYL)SULFIDE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

2-AMINOPYRIDINE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References