BENZOPHENONE-4 (Sulisobenzone)


  1. Basic Information
Product name Benzophone-4; BP-4 ;UV-284; Sulisobenzone
CAS No. 4065-45-6
EINECS No.  223-772-2
Molecular Formula: C14H12O6S
Molecular Weight: 308.31
Structure Formula  


  1. Technical Specification


Item        Specification
Appearance White or light yellow powder
Melting point ≥140℃
Loss on drying ≤5.0
Assay ≥ 99.0%
PH value 1.2-2.2
Water solution degree of turbidity ≤4.0EBC
Hazen ≤2.0
Heavy metal ≤5ppm


  1. Application field

Benzophenone-4, also knowns as Sulisobenzone, is a water-soluble & is recommended for the highest sun protection factors. Tests have shown that Benzophenone-4 stabilizes the viscosity of gels based on polyacrylic acid (Carbopol,Pemulen) when they are exposed to UV radiation.

Benzophenone-4 Concentrations of as low as 0.1% provides good results. It is used as ultra-violet stabilizer in wool, cosmetics, pesticides &lithographic plate coating.

It must be noted that Benzophenone-4 is not compatible with Mg salts, particularly in water-oil emulsions. Benzophenone-4 has a yellow color that becomes more intensive in the alkaline range & may alter the due of colored solutions.

Benzophenone-4 is a photostabilizer and sunscreen agent used for its ability to absorb UV rays. It helps prevent the integrity of other cosmetic ingredients from deteriorating under the sun. Though it covers UVB and short UVA (UVA-2) range rays, it’s an inadequate sunscreen agent when used alone. For this reason, it is often used in conjunction with other sun protecting ingredients. It’s used in a variety of personal care products like sunscreen, nail polish, lotion/cream and lipstick.

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.

The Food and Drug Administration (FDA) has approved the use of Benzophenone-3 and Benzophenone-4 as safe and effective, over-the-counter (OTC) sunscreen ingredients. When used as a sunscreen ingredient in the United States, Benzophenone-3 is called Oxybenzone, and may be used at concentrations up to 6%, and Benzophenone-4 is called Sulisobenzone, and may be used at concentrations up to 10%. Benzophenone ingredients absorb and dissipate UV radiation, which serves to protect cosmetics and personal care products. As part of sunscreen products, which are OTC drugs in the United States, Benzophenone-3 (Oxybenzone) and Benzophenone-4 (Sulisobenzone) protect the skin from the harmful effects of the sun. Exposing unprotected skin to UV light (primarily in the UV-B range) can result in sunburn and can promote premature aging of the skin and skin cancer.


  1. Packing

Benzophenone-4 Standard packaging includes the following:

25kg per drum

Other package sizes are available upon request.


  1. Storage

Benzophenone-4 shall be 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