white crystal
crystalline powder
ethanol.
Mo
Molecular formula: C11H12N2O2lecular Weight: 204.23
CAS :73-22-3
Appearance: white crystal or crystalline powder, slight odor, taste bitter.
Content: 98.5% to 101.5%
Melting point: 289 ° C, slightly soluble in water, insoluble in ethanol.
Specific Rotation: -29.4 ° ~ -32.8 °
Chloride: ≤ 0.05%
Sulfate (SO4): ≤ 0.03%
Iron salts (Fe): ≤ 0.003%
Heavy metals (Pb): ≤ 15ppm
Arsenic: ≤ 1.5 ppm
Loss on drying: ≤ 0.3%
Residue on ignition: ≤ 0.1%
PH: 5.5 ~ 7.0
Storage and transportation (Storeage): store in a cool dry place
Use: L-tryptophan is the human body can not synthesize essential amino acids. The food industry is mainly used for food and nutrition supplements. USP grade L-threonine used in the preparation of compound amino acid transfusion and amino acid preparations
Packaging: 25 kg / cardboard drum