Di-(1-naphthoyl)peroxide (CAS 29903-04-6)
Di-(1-naphthoyl)peroxide (CAS 29903-04-6) is an organic peroxide compound with molecular formula C22H14O4 and molecular weight 342.34. Also known as Di-(1-naphthoyl)peroxide, Di-1-naphthoyl peroxide, Bis(1-naphthoyl) peroxide. It typically appears in crystalline solid/powder form.
It is commonly used as a crosslinking agent or polymerization initiator in polymer processing.
Below you can find its complete physical and chemical properties, safety data, GHS hazard classifications, and a catalog of 0 products.
CAS 29903-04-6 is also known as:
- Di-(1-naphthoyl)peroxide
- Di-1-naphthoyl peroxide
- Bis(1-naphthoyl) peroxide
- Naphthalene-1-carbonyl naphthalene-1-carboperoxoate
- Peroxide, bis(1-naphthalenylcarbonyl)
CAS Number
29903-04-6
Molecular Formula
C22H14O4
Molecular Weight
342.34
EINECS Number
Not Specified
MDL Number
MFCD00134015
BRN Number
2330686
Chemical Name
Di-(1-naphthoyl)peroxide
Last Updated
6/1/2026
Aliases
Appearance
White to off-white crystalline powder
Appearance State
Solid. Insoluble in water, soluble in most aromatic and chlorinated organic solvents.
Color
White to Off-White
Odor
Slightly pungent odor
Form
Crystalline Solid/Powder
Melting Point
138-140 (decomp)
Boiling Point
481.6 °C to 527.5 °C (predicted) (Prone to violent homolytic exothermic decomposition and explosion under heat, normal pressure boiling point has no practical guiding significance)
Flash Point
216.8 to 233.0 (predicted)
Density
1.341 (predicted)
Vapor Density
11.8 (air=1)
Vapor Pressure
3.24E-11 to 1.23E-09 mmHg @ 25°C
Refractive Index
1.688 (predicted)
LogP Value
4.86 (predicted)
Merck Index
Not Specified
Solubility
Insoluble in water, soluble in ether, chloroform, benzene, and volatile oils
Water Solubility
0.45 mg/L @ 25 °C (predicted) (QSAR predicted value. Highly hydrophobic and prone to trace hydrolysis, extremely low solubility)
Solubility Detail
Slightly soluble in water, readily soluble in most organic solvents. Due to the high mechanical and thermal sensitivity of the pure solid, it is recommended to be phlegmatized or distributed as a stabilized solution for industrial radical initiation applications.
Storage Conditions
Store under strict temperature control (refrigerated, preferably below 5°C depending on SADT), protect from light, shock, and impact. Keep in an isolated, explosion-proof flammable danger storage area.
InChI Key
VIDGELNFXVPECZ-UHFFFAOYSA-N
GHS Hazard Symbols
Hazard Class
Signal Word
Danger
Hazard Symbols
E, Xi
Risk Codes
R2, R7, R36/37/38
UN Number
UN 3103 / UN 3113 (Depending on active oxygen content, phlegmatized state and temperature control requirements of the actual formulation)
IARC Classification
Not Classified
WGK Germany
2
RTECS Number
Not Specified
Auto-ignition Temperature
ca. 85 (self-accel. dec.)
TSCA Listed
Not Listed
Packing Group
II
Customs Code
2916399090
Occupational Exposure Band (OEB)
Not Specified
Occupational Exposure Limit (OEL)
Not Specified
Immediately Dangerous to Life or Health (IDLH)
Not Specified
Hazard Statements
H241, H315, H319, H335Precautionary Statements
P210, P220, P234, P240, P280, P370+P378, P370+P380+P375, P403+P235, P411, P420, P501Safety Statements
S3/7, S14, S16, S26, S36/37/39, S45
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