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Chemical Sampling Information (CSI)
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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 Guide: UN2085 Organic Peroxide

Chemical Description and Physical Properties:

Colorless, odorless solid.
molecular weight: 242
vapor pressure: <1 mm
boiling point: N.A.
melting point: 217F

Incompatibilities: Combustible substances, wood, paper, lithium aluminum hydride; explosive at high temperatures

Exposure Limits

OSHA Permissable Exposure Limit (PEL):

    General Industry: 5.0 mg/m3

    Construction Industry: 5.0 mg/m3 TWA

American Conference of Governmental Industrial Hygenists (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):

  • sampling media: FH Filter (37 mm) See Note
    analytical solvent: Methanol
    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 [17 KB PDF, 3 pages])
    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.

Conditions:

  • column: C18
    mobile phase: 80:20 Methanol: Water
    detector wavelength: 254nm
    detection limit: 0.04 mg/m3
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