MICA†

Chemical Identification
Chemical Identification
CAS # 12001-26-2
Formula

NA

Synonyms

biotite; lepidolite; margarite; muscovite; phlogopite; roscoelite

Physical Properties
Physical Properties
Physical description Colorless, odorless flakes or sheets of hydrous silicates.
Boiling point Molecular weight 797 (approx)
Freezing point/melting point Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 2.6-3.2 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 9075 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time*

240-480 min

Sampling volume (TWA)*

816 L

Sampling flow rate (TWA)*

1.7 L/min ±5%

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments Gravimetric
Method reference OSHA PV2121 (partially validated)
Notes
 

If the filter is not overloaded, samples can be collected up to an 8-hour period. If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for  the applicable component and appropriate results will be reported.

Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

20 mppcf (respirable)

REL-TWA
 
 

3 mg/m³ (respirable)

TLV-TWA
 
 

3 mg/m³ (respirable particulate matter) [1962]

PEL-TWA
 
 

3 mg/m³ (respirable dust)

PEL-STEL
 

 

REL-STEL
 
 

 

TLV-STEL
 
 

 

PEL-STEL
 
 

 

PEL-C
 

 

REL-C
 
 

 

TLV-C
 
 

 

PEL-C
 
 

 

Skin notation
 

N

Skin notation
 
 

N

Skin notation
 
 

N

Skin notation
 
 

N

Notes:
 
 

See 29 CFR 1910.1000 Table Z-3, Mineral Dusts.

Notes:
 
 

 

Notes:
 
 

 

Notes:
 
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 
 

1500 mg/m³

Carcinogenic classifications: Notes:
 
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 
 

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Mica (containing less than 1% quartz)

NIOSH: Pocket Guide to Chemical Hazards - Mica (containing less than 1% quartz)

Literature References

 
 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Mica. See annual publication for most recent information.

Last Updated Date : 01/05/2021