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Benzoyl Chloride

General Description

  • Synonyms: Benzenecarbonyl Chloride; alpha-Chlorobenzaldehyde; Benzoic Acid, Chloride
  • OSHA IMIS Code Number: B507
  • Chemical Abstracts Service (CAS) Registry Number: 98-88-4
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DM6600000; 19434
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: UN1736 137 Corrosive Material
  • Chemical Description and Physical Properties:
    • liquid, decomposed by water and alcohol
    • molecular weight: 140.57
    • molecular formula: C7H5ClO
    • density: 1.2070

Exposure Limits

  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.5 ppm, 2.8 mg/m3 Ceiling; Appendix A4 (Not Classifiable as a Human Carcinogen) AIHA_WEEL 1 ppm STEL

Health Factors

  • Carcinogenic Classification:
    • International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans
  • Health Effects: Chronic (Cumulative) Toxicity---Suspect Carcinogen or mutagen Acute Toxicity---short-term high hazard effects Respiratory Effects---Acute lung damage/edema LD50 (oral, rat) 7710 mg/kg
  • Skin Irritation: Primary irritant and sensitizer

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Midget Impinger containing 15 mL Xylene
  • maximum volume: 90 Liters
  • maximum flow rate: 1.0 L/min
  • current analytical method: Gas Chromatography; GC/ECD
  • analytical solvent: Xylene
  • method reference: 2 (OSHA In-House File)
  • method classification: Not Validated

Hendershott, James P. "Am. Ind. Hyg. Assoc. J." 1986, 47(12) 742-746 ....Title: The Simultaneous Determination of Chloroformates and Phosgene at Low Concentrations in Air Using a Solid Sorbent Sampling - Gas Chromatographic Procedure. ...Collection: 350 mg XAD-2 coated with di-n-butylamine (explained in article) Since they say it can be used for phosgene possibly the HMP coated XAD-2 would work. ...Flowrate: 50 mL/min Volume 24 Liters Desorb with 2mL of Hexane, remove as much as possible from resin, add 1mL of 1N HCL. ...Analysis: GC/FID nothing special ...Keywords: Acid Chlorides; Chlorothioformates

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