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Acetylsalicylic acid

General Description

  • Synonyms: (1)RTECS 85-86
  • OSHA IMIS Code Number: A629
  • Chemical Abstracts Service (CAS) Registry Number: 50-78-2
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VO0700000; 76971
  • Chemical Description and Physical Properties:
    • molecular weight: 180.15
    • melting point: 135°C
    • molecular formula: C9H8O4

Exposure Limits

  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Glass Fiber Filters (37 mm)
  • analytical solvent: Methanol
  • maximum volume: 120 Liters
  • maximum flow rate: 1.0 L/min
  • current analytical method: High Performance Liquid Chromatography; HPLC/UV
  • method reference: 2 (OSHA In-house File)
  • method classification: Not Validated
  • article: Reference: Bagon, D.A.; Warwick, C.J. "Anal. Proc." 1982, Nov. 519-522.

Column: C18

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