Tris Hydroxymethyl Aminomethane Brand Sigma Aldrich, Casno 77-86-1 Product Code 252859 , Pyromelitic Acid, Brandsigma Aldrich Cas No 89-05-4, Produt Id B4007 ,Pyromellitic Dianhydride, Cas No 89-32-7, Product Id412287 , Phthalic Acid Brand Sigma Aldrich Product Code402915 Cas No 88-99-3 , Isophorone Diamine, Brand Sigmaaldrich, Product Id 8.14123, Cas No 2855-13-2, Quantity: 26