BENZOYL PEROXIDE†

Chemical Identification
Chemical Identification
CAS # 94-36-0
Formula

C₁₄H₁₀O₄

Synonyms

benzoperoxide; dibenzoyl peroxide

Physical Properties
Physical Properties
Physical description Colorless to white crystals or a granular powder with a faint, benzaldehyde-like odor.
Boiling point decomposes explosively Molecular weight 242.2
Freezing point/melting point 217°F Vapor pressure <1 mmHg
Flash point 176°F Vapor density
Specific gravity 1.33 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 1 NFPA fire rating 4
NFPA reactivity rating 4 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0335
Sampling group
Sampler/Sampling media PTFE filter, 1 µm [SKC 225-2705]
Sampling time*
Sampling volume (TWA)*

40 L -400 L

Sampling flow rate (TWA)*

1-3 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments HPLC-UV
Method reference NIOSH 5009 (OSHA modified)
Notes

Keep samples refrigerated when not in transit. Ship samples overnight with cold-packs as soon as possible.

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

5 mg/m³

REL-TWA

5 mg/m³

TLV-TWA

5 mg/m³ [1990]

PEL-TWA

5 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

1500 mg/m³

Carcinogenic classifications: IARC-3, TLV-A4 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Benzoyl peroxide

NIOSH: Pocket Guide to Chemical Hazards - Benzoyl peroxide

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Benzoyl peroxide. See annual publication for most recent information.

Last Updated Date : 12/17/2020