Benzoyl Peroxide

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Has been shown to kill acne bacteria by generating reactive oxygen species in the sebaceous follicle. However, this process creates free radicals, so use only when needed and only on specific spots.

Benzoyl Peroxide (Wikipedia)
Benzoyl peroxide
Skeletal formula
Ball-and-stick model
IUPAC name
dibenzoyl peroxide
Other names
Benzoyl peroxide (BPO)


Dibenzoyl peroxide (DBPO)
94-36-0 YesY
ChEMBL ChEMBL1200370 N
ChemSpider 6919 YesY
EC Number 202-327-6
Jmol 3D image Interactive graph
KEGG D03093 YesY
PubChem 7187
RTECS number DM8575000
Molar mass 242.23 g·mol−1
Appearance colourless solid
Density 1.334 g/cm3
Melting point 103 to 105 °C (217 to 221 °F; 376 to 378 K) decomposes
D10AE01 (WHO) QD11AX90
Main hazards irritant, explosive
Safety data sheet See: data page
Explosive E (E)
Irritant Xi (Xi)
R-phrases R3, R7, R36, R43
S-phrases (S2), S3/7, S14, S36/37/39
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oilHealth code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gasReactivity code 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g., fluorineSpecial hazard OX: Oxidizer. E.g., potassium perchlorateNFPA 704 four-colored diamond
Flash point 80 °C; 176 °F; 353 K
80 °C (176 °F; 353 K)
Lethal dose or concentration (LD, LC):
7710 mg/kg (mouse, oral)
7000 mg/m3 (mouse, 4 hr)
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 5 mg/m3
REL (Recommended)
TWA 5 mg/m3
IDLH (Immediate danger)
1500 mg/m3
Supplementary data page
Refractive index (n),
Dielectric constantr), etc.
Phase behaviour
N verify (what is YesYN ?)
Infobox references

Benzoyl peroxide (BPO) is an organic compound in the peroxide family. It consists of two benzoyl groups bridged by a peroxide link. Its structural formula is [C6H5C(O)]2O2. It is one of the most important organic peroxides in terms of applications and the scale of its production. Benzoyl peroxide is used as an acne treatment, for bleaching flour, hair and teeth, for cross-linking polyester resins, and for many other purposes.

It is on the World Health Organization's List of Essential Medicines, the most important medications needed in a basic health system.

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