(C16-C18) and (C18)Unsaturated alkylcarboxylic acid (C16-C18) and C18 Unsaturated alkylcarboxylic acid 67701-08-0 67762-31-6 8034-55-7 EINECS 266-932-7 Fatty acids, C16-18 and C18-unsatd. SDA 11-005-00