Profile: Shijiazhuang Master and Trade Co., Ltd. is a supplier of chemical raw materials, food additives, feed additives, bulk drugs, veterinary raw materials, and pharmaceutical intermediates. Our products are vitamin C, amino acids, tryptophan, threonine, glycine, l-lysine hydrochloride, veterinary raw materials, oxytetracycline, doxycycline, amoxicillin, metronidazole, tiamulin, and amantadine. Our metacholine quinoline is a yellow or yellow crystalline powder, odorless, with a slightly bitter taste and light color gradient case depth.