Synonyms: Perlite (Less than 1% Quartz) prior to 9/1/89

OSHA IMIS Code Number: 2035

Chemical Abstracts Service (CAS) Registry Number: 93763-70-3

Chemical Description and Physical Properties:

a hydrous glassy volcanic rock expanded at 1400-2500°F to form thin flakes useful for their light weight

OSHA Permissible Exposure Limit (PEL):

General Industry: See Dust (Respirable Nuisance) or Dust, Total

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m³ TWA; The value is for particulate matter containing no asbestos and <1% crystalline silica. Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m³ TWA

Health Effects: Nuisance particulates-Accumulation in lungs (HE19)

Primary Laboratory Sampling/Analytical Method (SLC1):

• See Particulates not otherwise regulated (Total Dust)
  

** All Trademarks are the property of their respective owners.