Synonyms: HCBD; 1,3-Hexachlorobutadiene; Perchlorobutadiene

OSHA IMIS Code Number: H109

Chemical Abstracts Service (CAS) Registry Number: 87-68-3

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: EJ0700000; 21340

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2279 Keep Away From Food

Chemical Description and Physical Properties:

clear, colorless liquid
vapor pressure: 22 mm (100°C)
molecular formula: C₄C₁₆
boiling point: 210-220°C

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.02 ppm, 0.21 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): 0.02 ppm TWA (Skin); Potential carcinogen

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans

Primary Laboratory Sampling/Analytical Method (SLC1):

• sampling media: XAD-2 Tube (100/50 mg sections, 20/50 mesh)
  analytical solvent: Hexane
  maximum volume: 100 Liters
  maximum flow rate: 0.2 L/min
  current analytical method: Gas Chromatography; GC/ECD
  method reference: 1 (NIOSH 307)
  sampling analytical error: 0.15
  method classification: Partially Validated
  note: Protect samples from light at all times.

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