Giovanni Burini.Determination of the alkyl esters of p-hydroxybenzoic acid in mayonnaise by high-performance liquid chromatography and fluorescence labelling. Journal of Chromatography . 1994Determination of the alkyl esters of p-hydroxybenzoic acid in mayonnaise by high-performance liquid chromatography and...
The alkyl esters of p-hydroxybenzoic acid (parabens) are commonly used as preservatives in cosmetics, food products and pharmaceutical formulations because of their wide range antimicrobial activity. However, the usage of parabens in aqueous media has been hampered, especially parabens with long alkyl...
Parabens are alkyl esters of p-hydroxybenzoic acid widely used as preservatives in foodstuffs, cosmetics toiletries and pharmaceuticals. These compounds are known to exert a weak estrogenic activity in estrogen receptor assays in vitro. In addition butyl and propyl parabens show uterotrophic activity in...
p-Hydroxybenzoic acid esters as preservatives II. Acute and chronic toxicity in dogs, rats, and mice ]]>The results of a study of the acute and chronic toxicity of p-hydroxybenzoic acid and the methyl, ethyl, propyl, and butyl esters in mice, rats, and dogs are presented. All of these...
p-Hydroxybenzoic acid - difference spectrophotometric analysis in presence of alkyl estersSpectrophotometry, difference - analysis, p-hydroxybenzoic acid in presence of alkyl estersA difference spectrophotometric analytical method was developed for the selective determination of p-hydroxybenzoic acid in the ...
Parabens, alkyl esters of p-hydroxybenzoic acid, including methyl paraben (MP), ethyl paraben (EP), propyl paraben (PP) and butyl paraben (BP), have been widely used as antimicrobial agents. Recently, parabens in cosmetic products have received keen attent...
Solubilization Behavior of p-Hydroxybenzoic Acid Alkylesters with Nonionic Surfactants. I.non-ionic surfactantparabenHLBThe solubilization of alkylparabens with non-ionic surfactants was examined by equilibrium dialysis. The R value (Total amount of paraben/Free amount of paraben) increased linearly with ...
HPLCBox-Behnken DesignHPLC method after ultrasound assisted cloud point micro extraction (UA-CPME) for the simultaneous determination of p-hydroxy benzoic acid and its alkyl estersGuray, TufanAkl, Filiz HümeyraUysal, Ulku DilekSocial Science Electronic Publishing...
reacting the resulting mixture with two or more lower alkanols under heat to form a mixture of three or more lower alkyl esters of p-hydroxybenzoic acid, quenching the reaction when the ratio of the respective lower alkyl esters of p- hydroxybenzoic acid to each other is such that the mixture...
ALKANOLS TO FORM A MIXTURE OF THREE OR MORE THAN THREE ALKYL ESTERS LOWER THAN P-HYDROXYBENZOIC ACID, WHICH DISABLE THE REACTIONAL MIXTURE WHEN THE PROPORTION OF THE CORRESPONDING ALKYL SUPERIOR ESTHETIC MATTERS OF THE P-HYDROXYBENZOIC ACID IS SUCH AS THEIR MIXTURE IS IN THE FORM OF A FLUID ...