Appearance: white crystalline powder
Specific rotation[a]D20: -29.4～-32.8°
Chloride(Cl): 0.05% max
Sulfate(SO4): 0.03% max
Iron(Fe): 30ppm max
Heavy metals(Pb): 15ppm max
Arsenic: 2ppm max
Lead(Pb): 5ppm max
Other amino acids: not detectable
Loss on drying: 0.30% max
Residue on ignition: 0.10% max
Organic volatile impurities: Conforms
Storage: 2 years in seal and shading place
L-Tryptophan; H-Trp-OH; 73-22-3 is not synthesized from more basic substances in humans and other animals. It's essential amino acid that is necessary for normal growth in infants and for nitrogen balance in adults. It is a precursor of Indole Alkaloids in plants.
ChemSpecial | China, wholesale L-Tryptophan; H-Trp-OH; 73-22-3 with high quality and good price.