Tryptophan
Name:  L-Tryptophan
Synonyms:  L(-)-Tryptophan; (S)-2-Amino-3-(1H-indol-3-yl)propanoic acid; L-alphs-Amino-3-indolepropionic acid; Indole-3-alanine; Trp
Molecular Structure:  
Molecular Formula:  C11H12N2O2
Molecular Weight:  204.23
CAS Number73-22-3
EINECS200-795-6
 
L-Tryptophan is a natural anti-depressant, plentiful in protein foods but largely lost through cooking and processing. L-Tryptophan is a naturally occurring amino-acid. L-Tryptophan is a precursor for the mood-regulating serotonin the brain neurotransmitter linked with pleasure and fulfilment. L-Tryptophan's is used to alleviate depression, support alcohol withdrawal and to aid weight loss. L-Tryptophan plays an important role in our diets, and aging individuals are often in need of it as a supplement.
Tryptophan is a kind of white or a kind of white to yellowish crystalline powder, smell-less or slight smelly, L- type has the bitter taste, the DL- and the D- type have little sweet taste. 289¡ãC decompounds, slightly soluble in water, does not dissolve in the ethyl alcohol; Dissolves in the diluted acid or the diluted alkali, the long time illumination will color up; heat together with water can produce the water a small amount of indole, like when heat up under the sodium hydroxide, the cupric sulfate existence, then will produce massive indole; heats up with the acid in the hidden place will be more stable; when coexist with Medicine bulk drugs, carbohydrate, and aldehyde, L-Tryptophan is extremely easy to decompose.
Tryptophan is heterocyclic amino acid, is a kind of important and necessary amino acids for human body. L-Tryptophan is widely applied in pharmaceutical and food fields.
 
Specification
Product name
L-Tryptophan
Test Items
Specifications (USP24)
Appearance
Off-white crystals
Assay
98.5-101.5%
Specific rotation
-29.4¡ã to -32.8¡ã
pH
5.5-7.0
Loss on drying
0.3% Max
Residue ignition
0.1% Max
Chloride
0.05% Max
Ammonium
0.02% Max
Sulfate
0.03% Max
Iron
30ppm Max
Heavy metals
15ppm Max
 
Package: 25kgs per drum.
Storage: Stored in a dry and cool place, keep away from strong light and heat.
Shelf life: Two years when stored properly in a well-closed container.   
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