Synonyms: Sulfuric Acid, Calcium Salt (1:1); Crysalba; Drierite; Gibs; Thiolite

OSHA IMIS Code Number: C104

Chemical Abstracts Service (CAS) Registry Number: 7778-18-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: WS6920000; 79856

Chemical Description and Physical Properties:

white odorless powder or crystals, slightly soluble in water
molecular weight: 138.16
molecular formula: Ca.H2OS
melting point: 1450°C

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.

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

Primary Laboratory Sampling/Analytical Method (SLC1):

• See Particulates not otherwise regulated (Total Dust)
  

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