Sunscreens derived from paraaminobenzoic acid. Identification and dosage of N-propoxylated ethyl paraaminobenzoates in sun-creams.
Summary The derivatives of paraaminobenzoic acid listed by the council of Europe (February 1981) as 'Sunscreen agents used to protect the skin'can be determined by simple chromatographie methods (TLC + GLC) described in a previous article. In Amerscreen (R)-P*, (trade name of N-propoxylated ethyl paraaminobenzoate), four constituants are identified by means of nuclear magnetic resonance spectroscopy (NMR) and quantitatively measured by high pressure liquid chromatography (HPLC) in sun-creams.
Masse
M O
MO
Ministère de la Santé Publique, Institut d'Hygiene et d'Epidémiologie, Département Pharmatoxicologie, Cellule Cosmétiques, 14, rue J. Wytsman, 1050 Bruxelles, Belgium.
Herpol-Borremans
M
M
Et
R G
RG
Gleviczky
S
S