ABSTRACT

PHYSICAL STABILITY AND EFFECTIVENESS OF SUNSCREEN PRODUCT CONTAINING OXYBENZONE AND OCTYL METHOXYCINNAMATE IN CARBOMER 940 GEL WITH THE ADDITION OF GLYCOLIC ACID

The aim of this research is to know the effect of glycolic acid addition with the concentration of 8, 10, and 12% w/w on physical stability and effectiveness of sunscreen product containing oxybenzone and octyl methoxycinnamate (2 : 7% w/w) in carbomer 940 gel. The physical stability test is done by observing physical appearance, pH, and spreading ability on the 2nd, 7th, 14th, 30th, and 60th day after the product is made; while effectiveness test is done by in vitro determination of SPF (Sun Protection Factor) value with spectrophotometric method. The result of the physical stability test showed that glycolic acid addition affects the physical appearance (consistency) of sunscreen product, but pH and spreading ability are relatively stable during the storage; while effectiveness test showed that the addition of glycolic acid has an effect on SPF value of sunscreen product.

Product which combined with glycolic acid showed a significant increase of SPF value, compared to control formula. Considering the result of this research, it is suggested to perform a further research relating to the acceptability of sunscreen product containing oxybenzone and octyl methoxycinnamate when combined with glycolic acid and also one relating to the effectiveness of glycolic acid as skin whitening when combined with sunscreen agent oxybenzone and octyl methoxycinnamate.

Keyword :
oxybenzone, octyl methoxycinnamate, glycolic acid, gel, SPF, physical stability.

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