Purchase Qty. Reference FOB Price
1-99 kg US$31.00
100-199 kg US$29.00
200-499 kg US$22.00
500+ kg US$19.00
Product Description
Best Selling Products China Factory Supply Low Price High Quality Tryptophan CAS 73-22-3 Tryptophan is an amino acid that is made from plant or animal sources. It is known as an "essential" amino acid because the body does not produce it. Tryptophan is important to the functions of many organs in ...