Agent Name

Benzoyl peroxide

Alternative Name

Dibenzoyl peroxide

CAS Number




Major Category

Other Classes


Dibenzoyl peroxide; Abcat 40; Acetoxyl; Acne-Aid Cream; Acnegel; Akneroxid 5; Akneroxide L; Aksil 5; Asidopan; Aztec BPO; B 75W; BPO; BZF-60; Benbel C; Benox 50; Benoxyl; Benoxyl (5&10) Lotion; Benzac; Benzac W; Benzagel; Benzagel 10; Benzaknen; Benzashave; Benzoic acid, peroxide; Benzol peroxide; Benzoperoxide; Benzoyl peroxide; Benzoyl superoxide; Benzoylperoxid [German]; Benzoylperoxyde [Dutch]; Brevoxyl; Cadat BPO; Cadox 40E; Cadox B; Cadox B 40E; Cadox B 50P; Cadox B 70W; Cadox B-CH 50; Cadox BS; Chaloxyd BP 50FT; Clear By Design; Clearasil Antibacterial Acne Lotion; Clearasil BP Acne Treatment Cream; Debroxide; Desanden; Desquam E; Desquam X; Dibenzoyl peroxide; Dibenzoylperoxid [German]; Dibenzoylperoxyde [Dutch]; Diphenylglyoxal peroxide; Dry and Clear; Duresthin 5; Eloxyl; Epi Clear Antiseptic Lotion; Epi-Clear; Fostex; G 20; Garox; Incidol; Loroxide; Lucidol; Lucidol (peroxide); Lucidol 50P; Lucidol B 50; Lucidol G 20; Lucidol KL 50; Lucidol-70; Luperco AA; Luperco AST; Luperox FL; Mytolac; Nayper B and BO; Nayper bo; Norox bzp-250; Norox bzp-C-35; Novadelox; Oxy-10; Oxy-10 Cover; Oxy-5; Oxylite; PanOxyl; Perossido di benzoile [Italian]; Peroxide, dibenzoyl; Peroxyde de benzoyle [French]; Persa-Gel; Persadox; Quinolor compound; Resdan Akne; Stri-dex B.P.; Superox 744; Theraderm; Topex; Vanoxide; Xerac; epi-Cle; [ChemIDplus] UN2088


Peroxides, Organic


Colorless to white crystals or a granular powder with a faint, benzaldehyde-like odor; [NIOSH]


Used as a catalyst in polymer production, e.g., acrylates, and an oxidizer to bleach flour and other foods; [ACGIH]


Benzoyl peroxide is a skin irritant and infrequent sensitizer. It may cause allergic contact dermatitis in dentists using acrylate cements and in bakers handling bleached flour. [Marks, p. 188] If left on clothes, can cause reddening of the skin; [CHRIS] A skin, eye, and respiratory tract irritant; [ICSC]

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data


5 mg/m3


5 mg/m3


5 mg/m3, inhalable fraction


1500 mg/m3

Excerpts from Documentation for IDLHs

Human data: Concentrations of 12 mg/m3 and higher have resulted in pronounced irritation of the nose and throat [Moskowitz and Grabois 1950].

Vapor Pressure

7.06E-5 mm Hg

Lethal Concentration

LC50 (mice) = 7,000 mg/m3/4H

Explanatory Notes

Flash point = 176 deg F;

Half Life

No reports found; [TDR, p. 174]

Reference Link

ICSC: Benzoyl peroxide

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Skin Sensitizer


IARC Carcinogen

Not Classifiable

ACGIH Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap

Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure:


Activities with risk of exposure: