Synonyms: Muscovite; Amber mica; Roscoelite; Lipidolite; Phlogopite; Biotite Zinnwaldite; Fluorophlogopite; Margarite
OSHA IMIS Code Number: 9075
Chemical Abstracts Service (CAS) Registry Number: 12001-26-2
NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VV8760000
Chemical Description and Physical Properties:
colorless, odorless flakes or sheets with <1% quartz
molecular weight: 797
vapor pressure: approx. 0 mm
OSHA Permissible Exposure Limit (PEL):
General Industry: 20 mppcf (Silicates) (Z-3)
Construction Industry: 20 mppcf (Mineral Dusts Table)
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 3 mg/m3 TWA; The value is for particulate matter containing no asbestos and <1% crystalline silica. (Respirable fraction)
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 3 mg/m3 TWA
Potential Symptoms: Pneumoconiosis, coughing, dyspnea; weakness; weight loss
Health Effects: Accumulation in lungs (Pneumoconiosis) (HE10)
Affected Organs: Lungs
Primary Laboratory Sampling/Analytical Method (SLC1):
- sampling media: Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns preceded by 10 mm Nylon Cyclone
maximum volume: 960 Liters
maximum flow rate: 2.0 L/min
current analytical method: Gravimetric Analysis
method reference: 11, 12
sampling analytical error: 0.10
method classification: Fully Validated
note: If the gross weight of the sample yields a concentration below the standard for the air contaminate, do not submit sample to the Salt lake Technical Center for analysis.
alternate analytical method: X-ray Diffraction
method reference: 2 (OSHA ID-142)
sampling analytical error: 0.19
method classification: Fully Validated
note: Submit bulk sample in separate mailing container at time air samples are submitted. Indicate on sample sheet that a bulk sample has been submitted. Analysis is for Quartz.
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