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Chemical Sampling Information (CSI)
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General Description

Synonyms: (1)TSCA

OSHA IMIS Code Number: S122

Chemical Abstracts Service (CAS) Registry Number: 61790-53-2

Chemical Description and Physical Properties:

A soft siliceous solid composed of skeletons of small prehistoric aquatic plants. Contains primarily silica.

Exposure Limits

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 6 mg/m3 TWA

Health Factors

International Agency for Research on Cancer (IARC): Silica - Group 3, not classifiable as to its carcinogenicity to + humans (Amorphous Silica)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • See IMIS 9050, Silica, amorphous, Precipitated and Gel

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