Benzophenone
CAS Number
119-61-9
EC Number
204-337-6
What is Benzophenone?
Benzophenone (CAS 119-61-9), also known by its FEMA 2134 designation in flavor applications, is an aromatic ketone used as a photoinitiator and UV stabilizer.
Where is Benzophenone used?
- Coatings, inks and adhesives: initiates photopolymerization under UV light for rapid curing
- Printing inks and packaging coatings: Type II photoinitiator
- Plastics: UV stabilizer that slows photodegradation and extends service life
- Adhesives and sealants: supports UV-cure systems where thermal curing is impractical
- It also functions as a fragrance fixative in select formulations.
Good to know: In fragrance applications its regulatory status governs permitted use levels. Not to be confused with food-grade material, which is governed by specific guidelines.
Commercial specifications
- Purity typically 99% or above for standard industrial use
Other Names (Synonyms)
α-oxodiphenylmethane|phenyl ketone|diphenyl-methanon|diphenyl ketone|di(phenyl)methanone|benzoyl-benzene|alpha -oxodiphenylmethane|Methanone, diphenyl-
What are the physical properties of Benzophenone?
Melting Point 48.5 °C
Boiling Point 305.4 °C @ Press: 760 Torr
Density 1.1108 g/cm³ @ Temp: 18 °C
Flash Point >230 °F
Appearance Benzophenone is a combustible, white, crystalline solid with a rose-like odor
Color White to off-white
Odor Characteristic.
Form Crystalline Powder or Flakes
Water Solubility insoluble (<0.1 g/100 mL at 25 ºC)
Vapor Pressure 1 mm Hg ( 108 °C)
Refractive Index 1.5893
Log P 3.18 at 25℃
How is Benzophenone classified and handled safely? Learn More
Danger
GHS08· Health Hazard GHS09· Environmental Hazard GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H320 Causes eye irritation
H350 May cause cancer
H351 Suspected of causing cancer
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to Benzophenone?
HS Code 29143900
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects
WGK (Germany) 2