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Chemical Sampling Information (CSI)
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General Description

Synonyms: Silica (Fused) prior to 9/1/89

OSHA IMIS Code Number: 9013

Chemical Abstracts Service (CAS) Registry Number: 60676-86-0

Chemical Description and Physical Properties:

solid

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 mg/m3 TWA

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 3, not classifiable as to its carcinogenicity to humans (Amorphous Silica)

Health Effects: Pneumoconiosis (HE10)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

See Particulates not otherwise regulated (Respirable Fraction)

  • method reference: 11, 2 (OSHA ID-142)
    note: Fused silica does not diffract X-rays; evaluate + gravimetrically. Submit respirable sample to the Salt Lake Technical Center for quartz analysis.

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