Benzophenone-2
CAS Number
131-55-5
EC Number
205-028-9
Abbreviation
BP-2
What is Benzophenone-2?
Benzophenone-2 (CAS 131-55-5), commonly abbreviated as BP-2, is a hydroxybenzophenone-class UV absorber used to protect materials from ultraviolet-induced degradation.
Where is Benzophenone-2 used?
- Coatings and industrial polymers: extends service life of films, lacquers, and plastic substrates exposed to outdoor weathering
- Printing inks and packaging laminates: prevents UV-triggered color fading and resin breakdown over shelf life
- Adhesives, sealants, and elastomers: contributes to cross-linking stability under light exposure
- Personal care: historically used as a sunscreen active and UV filter in topical products
Good to know: Regulatory status varies by market; buyers should verify current compliance requirements before use.
Commercial specifications
- Purity specifications typically at 98% or above for the standard grade
Other Names (Synonyms)
2,2',4,4'-tetrahydroxybenzophenone|Bis(2,4-dihydroxyphenyl)methanone|Methanone, bis(2,4-dihydroxyphenyl)-|Uvinol D-50|Uvinul D-50|2,4,2',4'-Tetrahydroxybenzophenone|2,2',4,4'-hydroxybenophenone|Benzophenone, 2,2′,4,4′-tetrahydroxy-|BP-2
What are the physical properties of Benzophenone-2?
Melting Point 198-200 °C
Boiling Point 354 °C
Density 1.216
Appearance yellow to brown crystalline powder
Color Needles from H2O
Form Solid
Water Solubility Slightly soluble in water.
Refractive Index 1.4825 (estimate)
Log P 3.091 (est)
How is Benzophenone-2 classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H412 Harmful to aquatic life with long lasting effects
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
Which trade and regulatory codes apply to Benzophenone-2?
HS Code 29145090
Storage Class 11 - Combustible Solids
WGK (Germany) 3