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4-METHOXYPHENOL

Chemical Identification
CAS #	150-76-5
Formula	C₇H₈O₂
Synonyms	hydroquinone monomethyl ether; p-hydroxyanisole; mequinol; p-methoxyphenol; monomethyl ether hydroquinone

Physical Properties
Physical description	Colorless to white, waxy solid with an odor of caramel & phenol.
Boiling point	469°F	Molecular weight	124.2
Freezing point/melting point	126.5°F	Vapor pressure	<0.01 mmHg
Flash point	270°F (open cup)	Vapor density
Specific gravity	1.55	Ionization potential	7.50 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.)	M329
Sampling group
Sampler/Sampling media	XAD-7 tube (100/50 mg) [SKC 226-95]
Sampling time^*
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 PV2039 (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 mg/m³	TLV-TWA	5 mg/m³ [1992]	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:		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Hydroquinone monomethyl ether

NIOSH: Pocket Guide to Chemical Hazards - 4-Methoxyphenol

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 4-Methoxyphenol. 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 : 12/15/2020

2-ETHYLHEXANOIC ACID

Chemical Identification
CAS #	149-57-5
Formula	C₈H₁₆O₂
Synonyms	⍺-ethylcaproic acid; ⍺-ethylhexanoic acid; 2-bubylbutanoic acid; butylethylacetic acid; 2-ethyl-1-hexanoic acid; 2-ethylcaproic acid; ethylhexanoic acid; ethylhexoic acid

Physical Properties
Physical description	A colorless to light yellow liquid with a mild odor.
Boiling point	442°F	Molecular weight	144.21
Freezing point/melting point	-117°F	Vapor pressure
Flash point	260°F	Vapor density
Specific gravity	0.903	Ionization potential
Lower explosive limit (LEL)	1.04% at 275°F	Upper explosive limit (UEL)	8.64% at 370.4°F
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	5 mg/m³ (inhalable fraction and vapor), [2006]	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:		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 - Ethylhexoic acid

NIOSH: Pocket Guide to Chemical Hazards - Ethylhexoic acid

Literature References

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

Last Updated Date : 12/15/2020

SILICA, CRYSTALLINE, MIXED RESPIRABLE (QUARTZ, CRISTOBALITE, TRIDYMITE)‡

Chemical Identification
CAS #	14808-60-7 (quartz), 14464-46-1 (cristobalite), 15468-32-3 (tridymite)
Formula	Mixed
Synonyms	silica; crystalline silica; quartz; quartz dust; critobalite; cristobalite dust; tripoli

Physical Properties
Physical description	Colorless, odorless solid.
Boiling point	4046°F	Molecular weight	60.1
Freezing point/melting point	3110°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	2.66	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.)	9000
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min
Sampling volume (TWA)^*	816 L
Sampling flow rate (TWA)^*	1.7 L/min ±0.2 L/min
Sampling volume (STEL/Peak/C)^*	408-816 L
Sampling flow rate (STEL/Peak/C)^*	1.7 L/min ±0.2 L/min
Analytical method instruments	XRD
Method reference	OSHA ID-142 (fully validated)
Notes	OSHA personnel must obtain pre-weighted filters from SLTC. Quartz and cristobalite analysis may be submitted on the same filter. If a bulk sample is taken, send it to the lab in a separate mailing container from associated air samples. Bulk sampling is optional. In cases where bulk samples are submitted high-volume filter samples (without cyclones, preferably >1 g), and representative settled dust are preferred. Request analysis for Silica, Crystalline, Mixed Respirable (Quartz, Cristobalite, Tridymite), IMIS Code 9000. Cristobalite is a polymorph of respirable crystalline silica that occurs in workplaces where silica is heated to extremely hot temperatures (>1460 °C). If it is suspected that cristobalite may be present, note this on the Form OSHA-91A. Cristobalite is rare and will usually only be analyzed if the reason to suspect its presence is noted on the Form 91A. Tridymite, which is even rarer, will not be analyzed by SLTC because a standard reference material is not readily available.
Special requirements	The 10-mm nylon Dorr-Oliver operated at an optimized flow rate of 1.7 L/min is capable of collecting a sufficient quantity of quartz to exceed the limit of quantification when airborne concentrations are at or above the action level, provided that at least 4-hour air samples are taken.

^* 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	50 µg/m³ [25 µg/m³ Action Level]	REL-TWA	0.05 mg/m³	TLV-TWA	0.025 mg/m³ (respirable particulate matter), [2009]	PEL-TWA	0.05 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 1910.1053, Respirable crystalline silica. See 29 CFR 1910.1000 Table Z-3, Mineral Dusts for any operations or sectors where the exposure limits in 1910.1053 are stayed or otherwise not in effect.		Notes: CARCINOGEN (Ca): RESPIRABLE FRACTION, REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens.		Notes: See Appendix C: Particle Size-Selective Sampling Criteria for Airbone Particulate Matter		Notes: See footnote (n). See also California Code of Regulations, Title 8 §5204. Occupational Exposures to Respirable Crystalline Silica, and §2532.3. Occupational Exposures to Crystalline Silica.
Health factors: See NIH-NLM PubChem.		IDLH	50 mg/m³
Carcinogenic classifications: IARC-1, NIOSH-Ca, NTP-K, TLV-A2, MAK-1		Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals -

NIOSH: Pocket Guide to Chemical Hazards - Silica, crystalline (as respirable dust)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Silica, Crystalline - Alpha quartz [1317-95-9; 14808-60-7] and cristobalite [14464-46-1]. See annual publication for most recent information.
American Thoracic Society: Adverse effects of crystalline silica exposure. Am J Respir Crit Care Med. 155:761-768, 1997.
IARC: IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Volume 68, Silica. 1997.
IARC: IARC Monographs: Arsenic, Metals, Fibres, and Dusts, A Review of Human Carcinogens, Volume 100 C. 2012.
IARC: Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Man. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: http://monographs.iarc.fr/index.php p. V68, 183, 1997.
NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Crystalline Silica. 1974.
NIOSH: Occupational Health Guideline for Crystalline Silica. 1978.
Parks, C.G., Conrad, K., Cooper, G.S.: Occupational exposure to crystalline silica and autoimmune disease. Environ Health Perspect. 107 Suppl 5:793-802, Oct 1999.
Steenland, K.; Attfield, M.; Mannejte, A. Pooled Analyses of Renal Disease Mortality and Crystalline Silica Exposure in Three Cohorts. Ann. Occup. Hyg. 2002, 46, 4-9.

Last Updated Date : 01/11/2021

TALC (NOT CONTAINING ASBESTOS)†

Chemical Identification
CAS #	14807-96-6
Formula	H₂O₃Si.₃/₄Mg
Synonyms	non-fibrous talc; non-asbestiform talc

Physical Properties
Physical description	Odorless, white powder.
Boiling point		Molecular weight	379.26
Freezing point/melting point	1700-1800°F	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity	2.70-2.80	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.)	9030 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time^*	240-480 min
Sampling volume (TWA)^*	816 L
Sampling flow rate (TWA)^*	1.7 L/min ±5%
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric
Method reference	OSHA PV2121 (partially validated)
Notes	If the filter is not overloaded, samples can be collected up to an 8-hour period. If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for the applicable component and appropriate results will be reported.
Special requirements

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

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

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

**Exposure Limits**
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA	20 mppcf	REL-TWA	2 mg/m³ (resp)	TLV-TWA	2 mg/m³ (respirable particulate matter) [2009]	PEL-TWA	2 mg/m³ (respirable dust)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-3, Mineral Dusts.		Notes:		Notes: TLV value is for particulate matter containing no asbestos and <1% crystalline silica.		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1000 mg/m³
Carcinogenic classifications: IARC-3, TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Talc

NIOSH: Pocket Guide to Chemical Hazards - Talc (containing no asbestos and less than 1% quartz)

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Talc, Containing no asbestos fibers. See annual publication for most recent information.

Last Updated Date : 01/12/2021

TALC (CONTAINING ASBESTOS)‡

Chemical Identification
CAS #	14807-96-6
Formula	H₂O₃Si.₃/₄Mg
Synonyms	hydrous magnesium silicate; steatite talc

Physical Properties
Physical description	Odorless, white powder.
Boiling point		Molecular weight	varies
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		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.)	9031; request using analyte code 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	Use Asbestos TLV®	PEL-TWA
PEL-STEL	REL-STEL	TLV-STEL		PEL-STEL
PEL-C	REL-C	TLV-C		PEL-C
Skin notation	Skin notation	Skin notation		Skin notation
Notes: See ASBESTOS, ALL FORMS.	Notes: See ASBESTOS, ALL FORMS	Notes: See ASBESTOS, ALL FORMS		Notes: See ASBESTOS, ALL FORMS
Health factors: See NIH-NLM PubChem.	IDLH
Carcinogenic classifications:	Notes: Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Talc

NIOSH: Pocket Guide to Chemical Hazards - Talc

Literature References

Last Updated Date : 01/12/2021

M-XYLENE-⍺,⍺'-DIAMINE

Chemical Identification
CAS #	1477-55-0
Formula	C₆H₄(CH₂NH₂)₂
Synonyms	methylamine, m-phenylene bis-; m-phenylene-bis-(methylamine); m-xylylenediamine; 1,3-bis(aminomethyl)benzene; xylenediamine

Physical Properties
Physical description	Colorless liquid with an amine-like odor.
Boiling point	477°F	Molecular weight	136.2
Freezing point/melting point	58°F	Vapor pressure	0.03 mmHg at 77°F
Flash point	243°F	Vapor density
Specific gravity	1.032	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.)	2592
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^*	15 minutes (STEL, C)
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*	15 L
Sampling flow rate (STEL/Peak/C)^*	1 L/min
Analytical method instruments	HPLC
Method reference	OSHA ORG-105 (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		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	0.1 mg/m³	TLV-C	0.1 mg/m³ [1992]	PEL-C	0.1 mg/m³
Skin notation	NA	Skin notation	Y	Skin notation	Y	Skin notation	Y
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 - M-Xylene-⍺,⍺'-diamine

NIOSH: Pocket Guide to Chemical Hazards - m-Xylene-⍺,⍺'-diamine

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - m-Xylene ⍺,⍺'-diamine. See annual publication for most recent information."

Last Updated Date : 01/05/2021

FERBAM†

Chemical Identification
CAS #	14484-64-1
Formula	C₉H₁₈FeN₃S₆
Synonyms	tris(dimethyldithiocarbamato)iron; ferric dimethyl dithiocarbamate

Physical Properties
Physical description	Dark brown to black, odorless solid.
Boiling point	decomposes	Molecular weight	416.5
Freezing point/melting point	>356°F (decomposes)	Vapor pressure	0 mmHg (approx)
Flash point		Vapor density
Specific gravity		Ionization potential	7.72 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.)	1263 (total); request using analyte code 9135
Sampling group
Sampler/Sampling media	Tared low-ash 37 mm PVC filter, 5 microns [SLTC108]
Sampling time^*	240-480 min
Sampling volume (TWA)^*	960 L
Sampling flow rate (TWA)^*	2 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	Gravimetric
Method reference	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.
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)	REL-TWA	10 mg/m³	TLV-TWA	5 mg/m³ (inhalable particulate matter) [2008]	PEL-TWA	10 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	800 mg/m³
Carcinogenic classifications: IARC-3, TLV-A4		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Ferbam

NIOSH: Pocket Guide to Chemical Hazards - Ferbam

Literature References

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

Last Updated Date : 12/29/2020

OXALIC ACID†

Chemical Identification
CAS #	144-62-7
Formula	C₂H₂O₄
Synonyms	ethanedioic acid; oxalic acid (aqueous); oxalic acid dihydrate

Physical Properties
Physical description	Colorless, odorless powder or granular solid.
Boiling point	sublimes	Molecular weight	90.04
Freezing point/melting point	372°F	Vapor pressure	<0.001 mmHg
Flash point		Vapor density	4.3
Specific gravity	1.90	Ionization potential
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.)	1970
Sampling group
Sampler/Sampling media	GFF (37 mm), Type A/B [SKC 225-701]
Sampling time^*	100 min
Sampling volume (TWA)^*	100 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	IC
Method reference	OSHA PV2115 (partially validated)
Notes	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
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	1 mg/m³	TLV-TWA	1 mg/m³ [2014]	PEL-TWA	1 mg/m³
PEL-STEL		REL-STEL	2 mg/m³	TLV-STEL	2 mg/m³ [2014]	PEL-STEL	2 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:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	500 mg/m³
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Oxalic acid

NIOSH: Pocket Guide to Chemical Hazards - Oxalic acid

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Oxalic acid, anhydrous [144-62-7] and dihydrate [6153-56-6]. See annual publication for most recent information.
Chen, C.L., Chou, K.J., Wang, J.S., Yeh, J.H., Fang, H.C. and Chung, H.M.: Neurotoxic effects of carambola in rats: the role of oxalate. J. Formos. Med. Assoc. 101 (5): 337-441, 2002.
Pohanish, R.P. (editor): Oxalic Acid. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1763-1765.
Rofe, A.M., James, H.M., Bais, R., Edwards, J.B. and Conyers, R.A.: The production of (14C) oxalate during the metabolism of (14C) carbohydrates in isolated rat hepatocytes. Aust. J. Exp. Biol. Med. Sci. 58 (2): 103-116, 1980.
Salinas, M.L., Ogura, T. and Soffchi, L.: Irritant contact dermatitis caused by needle-like calcium oxalate crystals, raphides, in Agave tequilana among workers in tequila distilleries and agave plantations. Contact Dermatitis 44(2): 94-96, 2001.
Tse, K.C., et al.: Star fruit intoxication in uraemic patients: case series and review of the literature. Intern. Med. J. 33 (7): 314-316, 2003.

Last Updated Date : 01/28/2021

HEPTANE†

Chemical Identification
CAS #	142-82-5
Formula	C₇H₁₆
Synonyms	n-heptane (normal heptane), dipropyl methane

Physical Properties
Physical description	Colorless liquid with a gasoline-like odor.
Boiling point	209°F	Molecular weight	100.2
Freezing point/melting point	-131°F	Vapor pressure	40 mmHg
Flash point	25°F	Vapor density
Specific gravity	0.68	Ionization potential	9.90 eV
Lower explosive limit (LEL)	1.05%	Upper explosive limit (UEL)	6.7%
NFPA health rating	1	NFPA fire rating	3
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	1371
Sampling group	OVSG-1
Sampler/Sampling media	CSC tube (100/50 mg) [SKC 226-01]
Sampling time^*	80 min
Sampling volume (TWA)^*	4 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	OSHA 5000 (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	500 ppm (2000 mg/m³)	REL-TWA	85 ppm (350 mg/m³)	TLV-TWA	400 ppm [1979]	PEL-TWA	400 ppm (1600 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	500 ppm [1979]	PEL-STEL	500 ppm (2000 mg/m³)
PEL-C		REL-C	440 ppm (1800 mg/m³) [15 minutes]	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	750 ppm
Carcinogenic classifications: EPA-D		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - N-Heptane

NIOSH: Pocket Guide to Chemical Hazards - n-Heptane

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Heptane, all isomers. See annual publication for most recent information.
NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Alkanes (C5-C8). March 1977.
NIOSH: Occupational Health Guideline for Heptane. September 1978.

Last Updated Date : 04/13/2021

Group Sampling Information
Sampling Media	Sampling Time (If there are exceptions they will be in Notes)	TWA Sampling Volume (If there are exceptions they will be in Notes)	TWA Flow Rate (If there are exceptions they will be in Notes)
CSC Tube (100/50 mg sections, 20/40 mesh), [SKC 226-01]	240 min	12 L	0.05 L/min

Analytes Sampling Information
Analytes	IMIS Code	Wipe Sampling
Isobutyl Acetate	1534	No
n-Butyl Acetate	0440	No
sec-Butyl Acetate	0441	No
tert-Butyl Acetate	0442	No
Toluene**	2460	No
Ethyl Benzene	1080	No
Perchloroethylene (Tetrachloroethylene)**	2020	No
Trichloroethylene**	2490	No
Xylene	2590	No
Trimethylbenzene	2505	No
Benzene***	0320	No
Ethyl Acetate****	1040	No
n-Propyl Acetate‡	2180	No
Pentane‡‡	1990	No
Cyclohexane‡‡‡	0810	No
Heptane*	1371	No
n-Hexane‡‡‡‡	1380	No
Nonane*	N807	No
Octane*	1957	No

Notes

Request any (up to three (3)) of these analytes together.

Alternatively request IMIS Code Q115 and SLTC will report any significant amounts of these analytes.

Results for unrequested analytes in this group will be reported if significant amount are found.

Toluene, sec-Butyl Acetate, Benzene and Isobutyl Alcohol all have/are known interferences. Please indicate on the 91A which of these compounds are known to be present.

There is no need to contact SLTC before sampling.

*80 min (4L)

**Peak sampling 1 min (0.05 L) and Ceiling sampling 5 min (0.25 L)

***STEL sampling 15 min (0.75 L)

****120 min (6 L)

‡200 min (10 L)

‡‡45 min (2.25 L)

‡‡‡190 min (9.5 L)

‡‡‡‡98 min (4.9 L)

PIPERAZINE DIHYDROCHLORIDE

Chemical Identification
CAS #	142-64-3
Formula	C₄H₁₀N₂.₂HCl
Synonyms	piperazine hydrochloride

Physical Properties
Physical description	White to cream-colored needles or powder.
Boiling point		Molecular weight	159.1
Freezing point/melting point	635°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.)
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	0.03 ppm (inhalable fraction and vapor) [2011]	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: dermal sensitizer (DSEN), respiratory sensitizer (RSEN)		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 - Piperazine dihydrochloride

NIOSH: Pocket Guide to Chemical Hazards - Piperazine dihydrochloride

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Piperazine and salts [110-85-0], as piperazine. See annual publication for most recent information.

Last Updated Date : 01/08/2021

4-METHOXYPHENOL

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

2-ETHYLHEXANOIC ACID

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

SILICA, CRYSTALLINE, MIXED RESPIRABLE (QUARTZ, CRISTOBALITE, TRIDYMITE)‡

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TALC (NOT CONTAINING ASBESTOS)†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

TALC (CONTAINING ASBESTOS)‡

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

M-XYLENE-⍺,⍺'-DIAMINE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

FERBAM†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

OXALIC ACID†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

HEPTANE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References

PIPERAZINE DIHYDROCHLORIDE

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References