1562-93-2 4-(PHENYLAZO)BENZOIC ACID 4-Carboxyazobenzene 4-Phenylazobenzoic acid Azobenzene-4-carboxylic acid Azoic acid Benzoic acid, 4-(phenylazo)- Benzoic acid, p-(phenylazo)- (8CI) EINECS 216-347-8 NSC 2522 p-Phenylazobenzoic acid