C - 21 dicarboxylic acid is in liquid form derived from customized fatty acid blends from renewable crop sources. It is also known as (2 – cyclohexene - 1 – octanoic acid or 5 ( or 6 ) – carboxy - 4 – hexyl - ). Its cas number is 53980-88-4. It is insoluble in water. Soluble in most organic solvents. It has to be neutralize with Mea, tea, caustic soda or potassium hydroxide.