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NIOSH Pocket Guide to Chemical Hazards

September 2005

Asbestos

CAS
1332-21-4

Hydrated mineral silicates

RTECS
CI6475000
Synonyms & Trade Names

Actinolite, Actinolite asbestos, Amosite (cummingtonite-grunerite), Anthophyllite, Anthophyllite asbestos, Chrysotile, Crocidolite (Riebeckite), Tremolite, Tremolite asbestos
DOT ID & Guide
2212 171 (blue, brown)
2590 171 (white)

Exposure
Limits

NIOSH REL: Ca See Appendix A See Appendix C
OSHA PEL: [1910.1001] [1926.1101] See Appendix C
IDLH
Ca [N.D.] See: IDLH INDEX
Conversion
Physical Description
White or greenish (chrysotile), blue (crocidolite), or gray-green (amosite) fibrous, odorless solids.
MW: Varies
BP: Decomposes
MLT: 1112°F (Decomposes)
Sol: Insoluble
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: ?
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solids
Incompatibilities & Reactivities

None reported
Measurement Methods
NIOSH 7400, 7402; OSHA ID160, ID191
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: Daily
Remove: No recommendation
Change: Daily

First Aid
(See procedures)
Eye: Irrigate immediately

Breathing: Fresh air

Respirator Recommendations
(See Appendix E) NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Asbestosis (chronic exposure): dyspnea (breathing difficulty), interstitial fibrosis, restricted pulmonary function, finger clubbing; irritation eyes; [potential occupational carcinogen]
Target Organs
respiratory system, eyes

Cancer Site
[lung cancer]
See also: INTRODUCTION   See MEDICAL TESTS: 0019

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