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Benzoyl Peroxide

General Description

  • Synonyms: Dibenzoyl peroxide
  • OSHA IMIS Code Number: 0335
  • Chemical Abstracts Service (CAS) Registry Number: 94-36-0
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DM8575000; 19455
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: UN2085 Organic Peroxide
  • Chemical Description and Physical Properties:
    • Colorless, odorless solid
    • molecular weight: 242
    • vapor pressure: <1 mm
    • boiling point: N.A.
    • melting point: 217°F
  • Incompatibilities: Combustible substances, wood, paper, lithium aluminum hydride; explosive at high temperatures

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • General Industry: 5.0 mg/m3
    • Construction Industry: 5.0 mg/m3 TWA
  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA

Health Factors

  • Carcinogenic Classification:
    • International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans
  • Potential Symptoms: Skin, eye, mucous membrane irritation; sensitization; dermatitis
  • Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15)
  • Affected Organs: Skin, respiratory system, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • FH Filter (37 mm) See Note
  • maximum volume: 400 Liters
  • maximum flow rate: 3.0 L/min
  • current analytical method: High Performance Liquid Chromatography; HPLC/UL48.
  • method reference: 1 (OSHA modified NIOSH 5009 (PDF))
  • analytical solvent: Methanol
  • sampling and analytical error: 0.10
  • method classification: Fully Validated
  • note: Immediately after sampling, transfer filter to 20 mL scintillation vial before shipping. Ship refrigerated.

Column: C18 Mobile Phase: 80:20 Methanol:Water Detector Wavelength: 254nm Detection Limit: 0.04 mg/m3

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