2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid

Chemical properties

white to yellowish powder

Originator

Uval,Dome,US,1965

The Uses of 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid

2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid is a commonly used, FDA approved sunscreen chemical with uVA-absorbing properties and an approved usage level of 5 to 10 percent. It protects a formulation from the effects of uV-light exposure.

The Uses of 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid

Ultraviolet absorber for leather and textile fibers; in cosmetics and shampoos.

The Uses of 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid

sulisobenzone is the drug name for benzophenone-4, a sunscreen chemical.

Definition

ChEBI: Sulisobenzone is a member of benzophenones.

Manufacturing Process

663 g of dichloroethane and 74.6 g 2-hydroxy-4-methoxybenzophenone were charged into a 3-neck flask equipped with stirrer, thermometer, reflux condenser and dropping funnel and a heating mantle. The solution was heated to the reflux temperature (85°C to 86°C) and was dehydrated by distilling off 66.5 g 1,2-dichloroethane. While maintaining at reflux, 30 g chlorosulfonic acid was added slowly over a period of about two hours. The rate of addition was regulated by the speed of evolution of the HCl. After all the chlorosulfonic acid was added, the charge was still maintained at reflux for an additional 15 minutes to remove traces of HCl. It was then cooled to 5°C and filtered. The filter cake was washed with 500 g cold 1,2-dichloroethane and dried. 98 g of product were obtained.

brand name

Sungard (Bayer).

Therapeutic Function

Sunscreen agent

General Description

Sulisobenzone is a broad spectrum organic UV filter in sunscreen formulations, known to absorb deleterious UV light.

Flammability and Explosibility

Non flammable

Contact allergens

BZP-4 is widely used in cosmetics, particularly shampoos and hair products. Cross-reactivity is rarely expected in patients photoallergic to ketoprofen.