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General Description

  • Synonyms: Pyrocatechol
  • OSHA IMIS Code Number: 0571
  • Chemical Abstracts Service (CAS) Registry Number: 120-80-9
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UX1050000; 73250
  • Chemical Description and Physical Properties:
    • solid

Exposure Limits

  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 ppm, 23 mg/m3 TWA (Skin); Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans)
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 ppm TWA (Skin)

Health Factors

  • Carcinogenic Classification:
    • International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans
  • Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14) Kidney damage (HE3)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • OSHA Versatile Sampler (OVS-7) - 13mm XAD-7 tube (270/140 mg sections, 20/60 mesh) with a Glass Fiber Filter enclosed.
  • maximum volume: 100 Liters
  • maximum flow rate: 1.0 L/min
  • current analytical method: Gas Chromatography; GC/FID
  • analytical solvent: Methanol
  • method reference: 2 (OSHA In-House File)
  • method classification: Partially Validated

Column: 15m DB-Wax 0.25 film, 0.32 ID Oven: 90°C for 1 min to 220 at 15 deg/min Injector: 220°C Detector: 250 °C

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