Benzoyl peroxide (CAS 94-36-0)
Benzoyl peroxide (CAS 94-36-0) is an organic peroxide compound with molecular formula C14H10O4 and molecular weight 242.23. Also known as BENZOPEROXIDE, BENZOYL BENZENECARBOPEROXOATE, BENZOYL DIOXIDE. It typically appears in granular powder/crystal form.
Benzoyl Peroxide (BPO) plays a crucial role in the polymer industry. It is most commonly used as an initiator for free radical polymerization, showing exceptional performance in the polymerization of styrene (EPS), acrylates, and methyl methacrylate. Furthermore, BPO is an indispensable crosslinking agent in the vulcanization of silicone rubber and the room-temperature curing of unsaturated polyester resins. Its excellent thermal stability and controllable half-life ensure a stable and efficient industrial production process.
Below you can find its complete physical and chemical properties, safety data, GHS hazard classifications, and a catalog of 105 products from 19 verified manufacturers.
CAS 94-36-0 is also known as:
- BENZOPEROXIDE
- BENZOYL BENZENECARBOPEROXOATE
- BENZOYL DIOXIDE
- BENZOYL PEROXIDE
- Benzoyl superoxide
- DIBENZOYL PEROXIDE
- Acetoxyl
- BPO
CAS Number
94-36-0
Molecular Formula
C14H10O4
Molecular Weight
242.23
EINECS Number
202-327-6
MDL Number
MFCD00003071
BRN Number
971253
Chemical Name
Benzoyl peroxide
Last Updated
7/29/2025
Aliases
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
GHS Hazard Symbols
Hazard Class
Signal Word
Danger
Hazard Symbols
E
Risk Codes
R1, R2, R7, R36, R43, R50, R51/53
UN Number
UN 3108
IARC Classification
Group 3
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
Hazard Statements
H242,H317,H319,H360D,H410Precautionary Statements
P210,P235,P273,P280,P308+P313,P370+P378Safety Statements
S3/7, S14, S17, S26, S35, S36/37/39, S45, S47, S60, S61
19 verified suppliers offering 105 products for Benzoyl peroxide (CAS 94-36-0). Compare equivalent grades across brands (e.g., Trigonox vs Luperox) by assay, physical form, and availability from trusted manufacturers and distributors worldwide.
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