5,7-Octadecadiynoic Acid, 97%,1 G - 82391 Appearance - White to dark blue solid / flakes, Assay (HPLC area % at 226 nm) (%) 96.5 % - Min, Assay by Esterification (GC) 96.5 % - Min, Identification by GC/MS - Conforms, Insolubles / Polymer (%) 1.5 % Max CAS #:136667-54-4 UN#:CHEMICAL N Ship Name:5,7-OCTADECADIYNOIC ACID Formula:CH!3(CH!2)!9C#CC#C(CH!2)!3COOH