Benzophenone-9 (BP-9)


  1. Basic Information
Product name Benzophenone-9; BP-9
Chemical name sodium 2,2′-dihydroxy-4,4′-dimethoxybenzophenone-5,5′-disulfonate
CAS No. 76656-36-5
EINECS No.  278-520-4
Molecular Formula: C15H12Na2O11S2
Molecular Weight: 478.36
Structure Formula


  1. Technical Specification of Benzophenone-9
Item        Specification
Appearance Light yellow powder
Assay ≥ 65.0%
K-value >16.0
Solubility 5g/100ml Water
Hazen ≤6.0
Purity >98.0%


  1. Application field

Benzophenone-9 acts as a water soluble UV stabilizer.

Benzophenone-9 has a very broad absorption band which extends into the UVA and UVB range. Benzophenone-9 can absorb ultraviolet light of 290-400nm. Benzophenone-9 is used in light stabilizer, dope, plastics, cosmetic.

Benzophenone-9 is an effective light stabilizer for protecting water-based and cosmetic products from the damaging UV radiation which is a component of natural sunlight. In cosmetics/perfumes, the stability is improved.

Benzophenone-9 stabilizes colors in various applications. It has a very broad absorption band which extends into the UV-B range.

Benzophenone-9 is soluble at 5% in water thus finding application as a UV absorber in cosmetics, hair care products, textiles, and water-based paints and inks to protect product color, fragrance and to protect the polymer that gives gel its structure.

Benzophenone-9 is used in cosmetics, fragrances, hair care and personal care products.

Benzophenone-1, -3, -4, -5, -9 and-11 are compounds made from 2-hydroxybenzophenone. These compounds are powders. In cosmetics and personal care products, Benzophenone-1 and Benzophenone-3 are used mostly in the formulation of nail polishes and enamels. These Benzophenone ingredients are also used in bath products, makeup products, hair products, sunscreens and skin care products.

Benzophenone-1, Benzophenone-3, Benzophenone-4, Benzophenone-5, Benzophenone-9 and Benzophenone-11 protect cosmetics and personal care products from deterioration by absorbing, reflecting, or scattering UV rays. When used as sunscreen ingredients, Benzophenone-3 and Benzophenone-4 protect the skin from UV rays.


  1. Packing

Standard packaging includes the following:

25kg per drum

Other package sizes are available upon request.


  1. Storage

Store in a well-ventilated, cool, dry area, out of direct sunlight. Keep containers tightly closed when not in use.


  1. Period of validity

24 months