Mica, containing <1% crystalline silica, Respirable
CAS Number
12001-26-2
Last Revised
2025
TWA Limit
0.1 mg/m3
STEL
--
Ceiling Limit
--
Notes & Notations
- When there are occupational exposures to mica containing more than 1% crystalline silica, the B.C. exposure limit for "crystalline silica" should be applied (in addition to the B.C. exposure limit for mica).
Basis of B.C. Exposure Limit
Minimize the potential for:
Minimize the potential for:
- Pneumoconiosis
- Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.
Synonyms:
Muscovite; Phlogopite; Biotite; Lepidolite; Zimmwaldite; Roscoelite
;KAl2(AlSi3O10)(OH)2, or Al2K2O6Si (Muscovite)
IDLH:
1500 mg/m3
(Source: NIOSH)
If the substance you are searching has an entry that contains a size-selective fraction, form, or work activity, you should perform an additional search to confirm if other exposure limits may apply.
Ensure no workers are exposed to a substance that exceeds the exposure limits in accordance with OHSR 5.48.
Ensure no workers are exposed to a substance that exceeds the exposure limits in accordance with OHSR 5.48.