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Chemical Sampling Information
Silica, Crystalline Tridymite, Respirable Dust
 Field Definitions
 Analytical Methods
 Health Guidelines
General Description

NAME: Silica, Crystalline Tridymite, Respirable Dust

SYNONYM(s): Tridymite prior to 9/1/89

IMIS: 9017

CAS: 15468-32-3

Exposure Limits

OSHA GENERAL INDUSTRY PEL: see 1910.1000 Table Z-3

ACGIH TLV: 0.05 mg/m3 TWA; (Respirable fraction)

NIOSH REL: 0.05 mg/m3 TWA; Potential carcinogen

Health Factors

IARC: Silica - Group 2A, probably carcinogenic to humans (Crystalline + Silica)

Monitoring

PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):

See Silica, Crystalline Quartz, Respirable dust (IMIS 9010)
NOTE: Recognized reference material not available, analysis not performed at SLTC. Occurance of Tridymite extremely rare. Submit respirable sample to SLTC for quartz &/or cristobalite analysis.

WIPE:

No


Revision Date: 01/13/1999
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