2-Mercapto-4-methyl-1,3-thiazol-5-yl-acetic acid(MTAA): Appearance: white to buff crystalline power Identification : complies Assay(titration method): exceed or equal 98.0 percent Moisture: less than or equal 3.0 percent Melting point: exceed or equal 208-213 centigrade Absorbency: less than or equal 0.2 Acceptance standard: enterprise standard Package:25 kg/barrel Capacity: five ton/month