Esters of para‐aminobenzoic acid in cosmetics. Identification and dosage within sun‐creams
- 1 April 1979
- journal article
- Published by Wiley in International Journal of Cosmetic Science
- Vol. 1 (2) , 101-110
- https://doi.org/10.1111/j.1467-2494.1979.tb00204.x
Abstract
Synopsis A method is presented for the identification and determination by T.L.C. and G.L.C. of esters of para-aminobenzoic acid with a free amine function and of local anaesthetics, prohibited in cosmetic products, in accordance with the cosmetic directive 76/768/EEC. In a commercial product, nominally supplied as para-aminobenzoic monoglyceryl ester (authorised in sun-creams in accordance with the EEC directive) other phenyl groups with para substitution were identified by means of T.L.C. and N.M.R. spectroscopy; among them, the para-aminobenzoic ethyl ester. G.L.C. enables a quantitative determination of these substances.Keywords
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