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Chemical Sampling Information (CSI)
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General Description

Synonyms: Massive talc; Steatite

OSHA IMIS Code Number: S121

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VV8780000

Chemical Description and Physical Properties:

odorless solid; < 10% tremolite, < 1% silica, crystalline
molecular weight: 379
vapor pressure: approx. 0 mm

Incompatibilities: None hazardous

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 20 mppcf

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 3 mg/m3 TWA - Respirable Dust. The value is for particulate matter containing no asbestos and <1% crystalline silica. (Respirable fraction.)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 3 mg/m3 TWA

Health Factors

Potential Symptoms: Coughing, dyspnea; digital clubbing; cyanosis; basal crackles; coronary pulmonale

Health Effects: Pneumoconiosis (HE10)

Affected Organs: Lungs, CVS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • See Particulates not otherwise regulated (Respirable Fraction)
    note: Gravimetric analysis is field method. Following this analysis, submit sample to the Salt Lake Technical Center for Quartz analysis. If filter is not overloaded, samples may be collected up to an 8-hour period. Submit bulk sample in separate mailing container at time air samples are submitted.

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