Basic Info:

  • Chemical Synonym(s): Sulisobenzone; Sulisobenzone Hydrate; 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid; 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid; 2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid Hydrate; Expand
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  • CAS Number: 4065-45-6
  • Chemical Formula:


  • MSDS: Download


1.449 g/cm3
Boiling Point
Melting Point
Flash Point
1.4574 (rough estimate)
Refractive index
1.5300 (estimate)
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Benzophenone-4 is a benzophenone analog. It shows good stability and could give UV-A protection.

Because of its oxygen donor ability may react with another molecule and may quickly produce free radicals. It absorbs light like an electron donor and transfers into an excited state.

This reaction process has almost no side effects. It is a white crystalline solid with a sweet smell. It dissolves readily in oils and organic solvents such as alcohol, acetone and chloroform.

It is a broad-spectrum UV absorber. It has high light absorption efficiency, and at the same time, it has good light and heat stability.


Benzophenone-4 is used along with UV absorbers to stabilize color, act as a UV absorber, and prevent discoloration of the product.

It is a photosensitive agent that absorbs ultraviolet light and spits it back out as a longer wavelength. It is used in commercial sunscreen products as a blocker of UV-B rays.

It is a photosensitive compound that is used as a UVB filter in sunscreen products. Benzophenone UV absorbers can protect the products from the sun’s harmful UV radiation.

It is often used in lotion, sunscreen, lip balm, day/ night cream. It is also used to make polycarbonate plastics, which are used for making CDs, DVDs, cell phone covers, eyeglasses lenses, and medical test tubes.

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