(p-Hydroxybenzoyl)hydrazine 4-Hydroxybenzohydrazide 4-Hydroxybenzoic acid hydrazide 5351-23-5 Benzoic acid, 4-hydroxy-, hydrazide (9CI) Benzoic acid, p-hydroxy-, hydrazide (8CI) EINECS 226-326-5 NSC 647 p-Hydroxybenzhydrazide p-Hydroxybenzoic acid hydrazide p-Hydroxybenzoic hydrazide