... Molecular Formula C7H6O5 Molecular Weight 170.12 CAS Registry Number 149-91-7 EINECS 205-749-9 Gallic acid Synonyms 3 ... -carboxylic acid Molecular Formula C7H6O5Molecular Weight 170.12CAS Registry Number 149-91-7EINECS 205-749-9 Density 1.694Melting point 251 ... ,Ganjiabian,QiXia District,Nanjing,Jiangsu,China Natural Gallic acid CAS:149-91-7