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Calcium arsenate (as As)

General Description

  • Synonyms: Tricalcium arsenate; Tricalcium orthoarsenate; Cucumber dust
  • OSHA IMIS Code Number: 0500
  • Chemical Abstracts Service (CAS) Registry Number: 7778-44-1
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: CG0830000
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: 1573 151
  • Chemical Description and Physical Properties:
    • colorless, odorless solid
    • molecular weight: 398
    • vapor pressure: 0 mm

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • Construction Industry: 0.01 mg/m3 TWA 1910.1018

Health Factors

  • Carcinogenic Classification:
    • International Agency for Research on Cancer (IARC): Arsenic and Arsenic Compounds - Group 1, carcinogenic to humans
    • National Toxicology Program: Suspect Human Carcinogen (Arsenic)
  • Potential Symptoms: Weakness; gastrointestinal disturbances; peripheral neuropathy; hyperpigmentation, palmar planter hyperkeratoses; dermatitis; (carcinogenic) In animals: liver damage
  • Health Effects: Suspect carcinogen (HE2); Cumulative systemic poisoning (HE3)
  • Affected Organs: Eyes, respiratory system, liver, skin, lymphatics, central nervous system

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

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