Benzoyl peroxide

CAS Number

94-36-0

Molecular Formula

C14H10O4

Molecular Weight

242.23

EINECS Number

202-327-6

MDL Number

MFCD00003071

BRN Number

971253

Last Updated

7/29/2025

Appearance

White or pale yellow fine granules with a slight bitter almond odor

Appearance State

Crystals. Slightly soluble in water and ethanol, soluble in benzene, chloroform.

Color

White

Odor

Odorless

Form

Granular Powder/Crystal

Melting Point

105 (lit.)

Boiling Point

103 (dec.)

Flash Point

125 (o.c.)

Density

1.334

Vapor Density

>1 (air=1)

Vapor Pressure

0.009 Pa @ 25°C

Refractive Index

1.5430 (est.)

LogP Value

3.2 @ 20 °C

Merck Index

1116

Solubility

Slightly soluble in water, methanol; soluble in ethanol, ether, acetone, benzene, carbon disulfide, etc.

Water Solubility

insoluble in water

Solubility Detail

Solubility in water 0.35 g/L, soluble in ethanol, ether, acetone, benzene, etc.

Storage Conditions

Store at 2-8°C.

InChI Key

OMPJBNCRMGITSC-UHFFFAOYSA-N

Signal Word

Danger

Hazard Symbols

E

Risk Codes

R1, R2, R7, R36, R43, R50, R51/53

UN Number

UN 3108

IARC Classification

第 3 组

WGK Germany

2

RTECS Number

DM8575000

Auto-ignition Temperature

80 (self-dec.)

TSCA Listed

Listed (Active)

Packing Group

II

Customs Code

29163200

Occupational Exposure Band (OEB)

Not Specified

Occupational Exposure Limit (OEL)

OSHA PEL TWA: 5 mg/m³; ACGIH TWA: 5 mg/m³

Immediately Dangerous to Life or Health (IDLH)

1500 mg/m³