Application of p-hydroxyphenylpropionic acid_Kain Industrial Additives

Background and overview[1] P-hydroxyphenylpropionic acid is also called phloretinic acid. White to light yellow crystals. Relative molecular mass 166.18. Melting point 129~130℃. Boiling point 208~210℃ (1.867×103Pa). Insoluble in benzene and chloroform, soluble in ethanol, ether, ethyl acetate and hot water. The ortho position develops color when exposed to ferric chloride, but the para position does…