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Chemical Sampling Information (CSI)
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General Description

Synonyms: Tripoli; Silica, Crystalline-Tripoli

OSHA IMIS Code Number: S114

Chemical Abstracts Service (CAS) Registry Number: 1317-95-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VV7336000; 77722

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 mg/m3 TWA; respirable fraction of contained respirable quartz

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 mg/m3 TWA; Potential carcinogen

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Silica - Group 2A, probably carcinogenic to humans (Crystalline + Silica)
Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

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