This multiring intermediate, also known as Colchicine, presents as a very pale yellow to pale yellow crystalline powder. It is known to be soluble in water and methanol, very soluble in alcohols and chloroform, and very slightly soluble in ether and benzene. For best results, keep container tightly closed. Store in a cool and dark place, ideally under inert gas. Protect from moisture - This substance is light sensitive and hygroscopic. (S)-N-(5,6,7,9-Tetrahydro-1,2,3,10-tetramethoxy-9-oxobenzo[a]heptalen-7-yl)-acetamide is incompatible with oxidizing agents. This chemical is fatal if swallowed and may cause genetic defects.