Occupational Safety and Health Administration

DIMETHYL SULFATE†

Chemical Identification
CAS #	77-78-1
Formula	C₂H₆O₄S
Synonyms	dimethyl ester of sulfuric acid; dimethylsulfate; methyl sulfate

Physical Properties
Physical description	Colorless, oily liquid with a faint, onion-like odor.
Boiling point	370°F (decomposes)	Molecular weight	126.1
Freezing point/melting point	-25°F	Vapor pressure	0.1 mmHg
Flash point	182°F	Vapor density
Specific gravity	1.33	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	4	NFPA fire rating	2
NFPA reactivity rating	1	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0960
Sampling group
Sampler/Sampling media	Porapak Q tube (150/75 mg) [SKC 226-115]
Sampling time^*
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	GC-FPD
Method reference	OSHA PV2147 (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	Dräger - Dimethyl Sulfate 0.005/c, 6718701
Sampling information (see manufacturer instructions)	200 strokes, 0.005-0.05 ppm range, uncertainty approx 50%

**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 (5 mg/m³)	REL-TWA	0.1 ppm (0.5 mg/m³)	TLV-TWA	0.1 ppm [1985]	PEL-TWA	0.1 ppm (0.5 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: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	7 ppm
Carcinogenic classifications: IARC-2A, NOSH-Ca, NTP-R, TLV-A3, EPA-B2		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dimethyl sulfate

NIOSH: Pocket Guide to Chemical Hazards - Dimethyl sulfate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dimethyl sulfate. See annual publication for most recent information.
EPA Air Toxics Website: Dimethyl sulfate. U.S. Environmental Protection Agency Technology Transfer Network.
NIOSH Registry of Toxic Effects of Chemical Substances: Sulfuric acid, dimethyl ester (RTECS # WS8225000).
Anonymous: Dimethyl sulfate. IARC Monogr. Eval. Carcinog. Risks Hum. 71(Pt. 2): 575-588, 1999.
Pohanish, R.P. (editor): Dimethyl Sulfate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 939-941.
Schettgen, T., Broding, H.C., Angerer, J. and Drexler, H.: Dimethyl sulphate: a hidden problem in occupational medicine. Occup. Environ. Med. 61(1): 73-75, 2004.
Wang, Y., Xia, J. and Wang, Q.: Clinical report on 62 cases of acute dimethyl sulfate intoxication. Am. J. Ind. Med. 13(4): 455-462, 1988.

Last Updated Date : 12/28/2020

ESTRONE

Chemical Identification
CAS #	53-16-7
Formula	C₁₈H₂₂O₂
Synonyms	aquacrine; crinovaryl; 1,3,5-estratriene-3-ol-17-one; erystogen; 3-hydroxyestra-1,3,5(10)-trien-17-one; menagen

Physical Properties
Physical description	Solid white powder.
Boiling point		Molecular weight	270.37
Freezing point/melting point	489.2°F	Vapor pressure
Flash point		Vapor density
Specific gravity		Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	E320
Sampling group
Sampler/Sampling media	GFF Gelman Type A (37 mm) in 3-piece cassette no backup pad [SKC 225-706]
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	HPLC
Method reference	OSHA PV2001 (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		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: NTP: Known human carcinogen (estrogen, steroidal)		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Not listed

NIOSH: Pocket Guide to Chemical Hazards - Not listed

Literature References

No Author: Estrogens, Steroidal . Report on Carcinogens (latest edition); U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program.
de Ronde, W., Hofman, A., Pols, H.A.P. and de Jong, F.H.: A direct approach to the estimation of the origin of oestrogens and androgens in elderly men by comparison with hormone levels in postmenopausal women. Eur. J. Endocrinol. 152(2): 261-268, 2005.
Kuiper, G.G.J.M., et al.: Comparison of the ligand binding specificity and transcript tissue distribution of estrogen receptors α- and β-. Endocrinology 138(3): 863-870, 1997.
Loose-Mitchell, D.S. and Stancel, G.M.: Estrogens and Progestins (Chapter 58). In, Goodman & Gilman's The Pharmacological Basis of Therapeutics, 10th Ed. J.G. Hardman, L.E. Limbird and A.G. Gilman, eds. New York: McGraw-Hill, 2001, pp. 1597-1634.
Pohanish, R.P. (editor): Estrone. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1025-1027.
Zeleniuch-Jacquotte, A., et al.: Postmenopausal endogenous oestrogens and risk of endometrial cancer: results of a prospective study. Br. J. Cancer 84(7): 975-981, 2001.

Last Updated Date : 12/28/2020

DICYCLOPENTADIENE

Chemical Identification
CAS #	77-73-6
Formula	C₁₀H₁₂
Synonyms	bicyclopentadiene; DCPD; 1,3-dicyclopentadiene dimer; 3a,4,7,7a-tetrahydro-4,7-methanoindene

Physical Properties
Physical description	A liquid with an acrid odor.
Boiling point	342°F	Molecular weight	132.2
Freezing point/melting point	92.5°F	Vapor pressure	1.4 mmHg
Flash point	90°F (open cup)	Vapor density	4.55
Specific gravity	0.98	Ionization potential
Lower explosive limit (LEL)	0.8%	Upper explosive limit (UEL)	6.3%
NFPA health rating	3	NFPA fire rating	3
NFPA reactivity rating	1	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0903
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
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	GC-FID
Method reference	OSHA PV2098 (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	5 ppm (30 mg/m³)	TLV-TWA	0.5 ppm [2018]	PEL-TWA	5 ppm (30 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	1 ppm [2018]	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: 0.01 ppm/5 ppm/75 ppm

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dicyclopentadiene

NIOSH: Pocket Guide to Chemical Hazards - Dicyclopentadiene

Literature References

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

Last Updated Date : 12/28/2020

AMMONIUM SULFAMATE†

Chemical Identification
CAS #	7773-06-0
Formula	H₃NO₃S.H₃N
Synonyms	ammate herbicide; ammonium aminosulfonate; AMS, monoammonium salt of sulfamic acid; sulfamate

Physical Properties
Physical description	Colorless to white crystalline, odorless solid.
Boiling point	320°F (decomposes)	Molecular weight	114.1
Freezing point/melting point	268°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	1.77	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.)	0185 (total); request using analyte code 9135	A111 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min	240-480 min
Sampling volume (TWA)^*	960 L	816 L
Sampling flow rate (TWA)^*	2 L/min	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric	Gravimetric
Method reference	OSHA PV2121 (partially validated)	OSHA PV2121 (partially validated)
Notes	If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for the applicable component and appropriate results will be reported.	If the filter is not overloaded, samples can be collected up to an 8-hour period. If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for the applicable component and appropriate results will be reported.
Special requirements	FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

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

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	15 mg/m³ (total dust), 5 mg/m³ (respirable fraction)	REL-TWA	10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)	TLV-TWA		PEL-TWA	10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: Visit the ACGIH TLV site for specific data		Notes: See footnote [n].
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 - Ammonium sulfamate

NIOSH: Pocket Guide to Chemical Hazards - Ammonium sulfamate

Literature References

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

Last Updated Date : 03/29/2024

LEAD CHROMATE‡

Chemical Identification
CAS #	7758-97-6
Formula	PbCrO₄
Synonyms	plumbous chromate; lead chromate (VI)

Physical Properties
Physical description	Yellow or orange-yellow crystals or powder.
Boiling point	482°F (decomposes)	Molecular weight	323.2
Freezing point/melting point	1551°F	Vapor pressure
Flash point		Vapor density
Specific gravity	6.12 at 59°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.)	0689 [CHROMIUM VI COMPOUNDS (HEXAVALENT CHROMIUM)] and/or 1591 [LEAD]
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 CHROMIUM VI COMPOUNDS (HEXAVALENT CHROMIUM) and/or LEAD
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	5 µg/m³ [2.5 µg/m³ Action Level] (as CrVI)	REL-TWA	0.0002 mg/m³ (8 hr TWA)	TLV-TWA	0.0002 mg/m³ (inhalable particulate matter) [2017]	PEL-TWA	0.005 mg/m³ (as Cr)
PEL-STEL		REL-STEL		TLV-STEL	0.0005 mg/m³ (inhalable particulate matter) [2017]	PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: OSHA's chromium (VI) standard applies to all occupational exposures to any chromium species with a valence of positive six, regardless of form or compound, including chromates and chromic acid. See 29 CFR 1910.1026, Chromium (VI). See LEAD for information regarding lead exposure.		Notes: CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens and Appendix C, Supplementary Exposure Limits.		Notes: dermal sensitization (DSEN), respiratory sensitization (RSEN), BEI®		Notes:
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: IARC-2A, NIOSH-Ca, NTP-K, TLV-A1, EPA-A		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Lead chromate

NIOSH: Pocket Guide to Chemical Hazards - Chromic acid and chromates

Literature References

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

Last Updated Date : 01/04/2021

ASBESTOS - TREMOLITE‡

Chemical Identification
CAS #	77536-68-6
Formula	Hydrated mineral silicate
Synonyms

Physical Properties
Physical description	White to gray, odorless solid. Brittle texture. Common contaminant in chrysotile and talc deposits.
Boiling point	decomposes	Molecular weight	varies
Freezing point/melting point	1112°F (decomposes)	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity		Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	9020
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 ASBESTOS, ALL FORMS
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	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: TWA = 0.1 f/cc, STEL = 1 f/cc [30 MINUTES]. See 29 CFR 1910.1001, Asbestos.		Notes: TWA = 0.1 f/cc AS DETERMINED BY A 400-LITER AIR SAMPLE COLLECTED OVER 100 MINUTES (NIOSH ANALYTICAL		Notes: See ASBESTOS, ALL FORMS		Notes: See ASBESTOS, ALL FORMS
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: EPA-A, IARC-1, NIOSH-Ca, NTP-K, OSHA-Ca, TLV-A1		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Asbestos

NIOSH: Pocket Guide to Chemical Hazards - Asbestos

Literature References

Last Updated Date : 12/17/2020

ASBESTOS - ACTINOLITE‡

Chemical Identification
CAS #	77536-66-4
Formula	Hydrated mineral silicate
Synonyms

Physical Properties
Physical description	Pale to dark green, odorless solid. Brittle texture. Common contaminant in amosite deposits.
Boiling point	decomposes	Molecular weight	varies
Freezing point/melting point	1112°F (decomposes)	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity		Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	9020
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 ASBESTOS, ALL FORMS
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	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: TWA = 0.1 f/cc, STEL = 1 f/cc [30 MINUTES]. See 29 CFR 1910.1001.		Notes: TWA = 0.1 f/cc AS DETERMINED BY A 400-LITER AIR SAMPLE COLLECTED OVER 100 MINUTES (NIOSH ANALYTICAL		Notes: See ASBESTOS, ALL FORMS		Notes: See ASBESTOS, ALL FORMS
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications: EPA-A, IARC-1, NIOSH-Ca, NTP-K, OSHA-Ca, TLV-A1		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Asbestos

NIOSH: Pocket Guide to Chemical Hazards - Asbestos

Literature References

Last Updated Date : 11/17/2020

HEXACHLOROCYCLOPENTADIENE

Chemical Identification
CAS #	77-47-4
Formula	C₅Cl₆
Synonyms	HCCPD; hexachloro-1,3-cyclopentadiene; 1,2,3,4,5,5-hexachloro-1,3-cyclopentadiene; perchlorocyclopentadiene

Physical Properties
Physical description	Pale-yellow to amber-colored liquid with a pungent, unpleasant odor.
Boiling point	462°F	Molecular weight	272.8
Freezing point/melting point	16°F	Vapor pressure	0.08 mmHg at 77°F
Flash point		Vapor density	9.4
Specific gravity	1.71	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.)	1374
Sampling group
Sampler/Sampling media	Sorbent tubes, 2 Porapak-T tubes [SKC 226-116A]
Sampling time^*
Sampling volume (TWA)^*	0.25 L - 90 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-ECD
Method reference	NIOSH 2518 (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		REL-TWA	0.01 ppm (0.1 mg/m³)	TLV-TWA	0.01 ppm [1990]	PEL-TWA	0.01 ppm (0.11 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 - Hexachlorocyclopentadiene

NIOSH: Pocket Guide to Chemical Hazards - Hexachlorocyclopentadiene

Literature References

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

Last Updated Date : 01/29/2021

BARIUM SULFATE†

Chemical Identification
CAS #	7727-43-7
Formula	BaSO₄
Synonyms	artificial barite; barite; barium salt of sulfuric acid; barytes (natural)

Physical Properties
Physical description	White or yellowish, odorless powder.
Boiling point	2912°F (decomposes)	Molecular weight	233.4
Freezing point/melting point	2876°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	4.25-4.5	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.)	B101 (total); request using analyte code 9135	B104 (resp); request using analyte code 9030
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min	240-480 min
Sampling volume (TWA)^*	960 L	816 L
Sampling flow rate (TWA)^*	2 L/min	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric	Gravimetric
Method reference	OSHA PV2121 (partially validated)	OSHA PV2121 (partially validated)
Notes	Samples collected for this compound are analyzed gravimetrically. Results reported for the requested compound will be qualified based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes; no further work on the sample will be performed due to method limitations.	Samples collected for this compound are analyzed gravimetrically. Results reported for the requested compound will be qualified based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes; no further work on the sample will be performed due to method limitations. The standard applies to the Respirable Fraction. Samples must be collected with a Dorr-Oliver cyclone.
Special requirements	FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

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

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	15 mg/m³ (total dust), 5 mg/m³ (respirable fraction)	REL-TWA	10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)	TLV-TWA		PEL-TWA	10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes: Visit the ACGIH TLV site for specific data The value is for particulate matter containing no asbestos and <1% crystalline silica.		Notes: As Particulates not otherwise regulated. See footnote [n].
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 - Barium sulfate

NIOSH: Pocket Guide to Chemical Hazards - Barium sulfate

Literature References

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

Last Updated Date : 04/02/2024

DIMETHYL SUCCINATE

Chemical Identification
CAS #	106-65-0
Formula	C₆H₁₀O₄
Synonyms	butanedioic acid, dimethyl Ester; dimethyl butanedioate; methyl succinate; succinic acid, dimethyl ester

Physical Properties
Physical description	Colorless liquid.
Boiling point	385.5°F	Molecular weight	146.14
Freezing point/melting point	67.1°F	Vapor pressure	0.3 mmHg at 68°F
Flash point	185°F	Vapor density
Specific gravity	1.117	Ionization potential
Lower explosive limit (LEL)	1%	Upper explosive limit (UEL)	8.5%
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.)	D917
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*	100 min
Sampling volume (TWA)^*	20 L
Sampling flow rate (TWA)^*	0.2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	OSHA PV2021 (partially validated)
Notes	Samples should be refrigerated after sampling and shipped overnight to the laboratory.
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:		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dimethyl succinate

NIOSH: Pocket Guide to Chemical Hazards - Dimethyl succinate

Literature References

Last Updated Date : 12/28/2020

DIMETHYL SULFATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ESTRONE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DICYCLOPENTADIENE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

AMMONIUM SULFAMATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

LEAD CHROMATE‡

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ASBESTOS - TREMOLITE‡

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

ASBESTOS - ACTINOLITE‡

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

HEXACHLOROCYCLOPENTADIENE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

BARIUM SULFATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

DIMETHYL SUCCINATE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References