ASBESTOS, ALL FORMS‡

Chemical Identification
CAS # 1332-21-4, [12172-67-7 (Ferroactinolite asbestos), 17068-78-9 (Anthophyllite asbestos), 12172-73-5 (Amosite asbestos), 12001-29-5 (Chrysotile asbestos), 12001-28-4 (Crocidolite asbestos), 14567-73-8 (Tremolite asbestos)]
Formula

chrysotile Mg₃Si₂O₅(OH)₄ crocidolite Na₂Fe₃ ²⁺Fe₂ ³⁺Si₈O₂₂(OH)₂ Amosite (Mg,Fe)₇Si₈O₂₂(OH)₂₂ tremolite-actinolite series Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ anthophyllite (Mg,Fe)₇Si₈O₂₂(OH)₂

Synonyms

actinolite; Amosite (cummingtonite-grunerite); anthophyllite, chrysotile; crocidolite (riebeckite); tremolite

Physical Properties
Physical description White or greenish (chrysotile), blue (crocidolite), or gray-green (amosite) fibrous, odorless solids.
Boiling point Molecular weight varies
Freezing point/melting point dehydroxylates at 550-750°C (1,022-1,382°F) 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 Mixed cellulose ester filter (MCEF) 0.8 microns (25 mm), with electrically conductive 50 mm extension cowl [GCS25080]
Sampling time*

30-480 min (120 recommended)

Sampling volume (TWA)*

25-2400 L

Sampling flow rate (TWA)*

0.5-2.5 L/min, 0.5-5.0 L/min (Maritime)

Sampling volume (STEL/Peak/C)*

48 L

Sampling flow rate (STEL/Peak/C)*

1.6 L/min

Analytical method instruments PCM
Method reference OSHA ID-160 (fully validated)
Notes

Adjust to give 100-1300 fiber/mm. Do not request multiple analytes. Do not overload. If dust is high, reduce air volume to avoid overloading. A minimum of 2 blanks or 10% of the number of samples are required for every set.

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.

Wipe Method
Sampler/Sampling media

Wipe sampling is not recommended - Contact SLTC if there is a question

Bulk Method
Bulk Method

See OSHA ID-191 - take samples using 20 mL scintillation vials. Do not use plastic bags. Send to SLTC in separate packaging from air samples.

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

0.1 fiber/cm³, 1.0 fiber/cm³ [Excursion Limit 30 min]

REL-TWA

Lowest feasible concentration. 0.1 fiber/cm³ for fibers >5 µm

TLV-TWA

0.1 f/cc [1994]

PEL-TWA

0.1 fiber/cm³

PEL-STEL REL-STEL TLV-STEL PEL-STEL

1 fiber/cm³

PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1001, Asbestos.

Notes:

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. Also see Appendix C, Supplementary Exposure Limits.

Notes:

See footnote (F) for additional information

Notes:
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:

Last Updated Date : 12/17/2020