The propyl ester of sodium 4-hydroxybenzoic acid (see benzoic acid below), is used as a food additive (E 217). The sodium 4-hydroxybenzoic acid propyl ester (no longer permitted in the EU since 2016).
The propyl ester of sodium 4-hydroxybenzoic acid (see benzoic acid below), is used as a food additive (E 217). The sodium 4-hydroxybenzoic acid propyl ester (no longer permitted in the EU since 2016).