Products Preservatives can be found in liquid, semi-solid and solid pharmaceuticals. They are also used for food and cosmetics. Structure and properties Preservatives belong to various chemical groups. These include, for example: Acids and their salts Benzoic acid derivatives, 4-hydroxybenzoic acid derivatives. Quaternary ammonium compounds Alcohols Phenols Preservatives can be of natural and synthetic origin. … Preservative
Definition On the one hand, drugs contain the active ingredients that mediate the pharmacological effects. On the other hand, they consist of excipients, which are used for the production or to support and regulate the drug effect. Placebos, which consist only of excipients and contain no active ingredients, are an exception. Excipients can be of … Auxiliary Materials
Products Parabens are found in numerous pharmaceuticals, cosmetics, and foods, among other products, as excipients or food additives. Structure and properties Parabens are ester derivatives of 4-hydroxybenzoic acid (= para-hydroxybenzoic acid). They exist as white, odorless and tasteless powders and are sparingly soluble in water. Water solubility decreases with the length of the side chain. … Parabens
Products Ethyl 4-hydroxybenzoate is mainly used as an excipient in liquid pharmaceuticals. Structure and properties Ethyl 4-hydroxybenzoate (C9H10O3, Mr = 166.2 g/mol) exists as a white crystalline powder or as colorless crystals and is very sparingly soluble in water. Ethyl 4-hydroxybenzoate belongs to the group of parabens. It is the ethyl ester of -hydroxybenzoic acid. … Ethyl 4-Hydroxybenzoate
