L-TRYPTOPHAN
1. Description
(1) Product Name: L-tryptophan, also called as amino indopropionic acid
(2) Molecular Formula: C11H12N2O2
(3) English Name: Tryptophan
(4)CAS NO73-22-3
(5) Physical and Chemical Properties:
They are white or offwhite to yellowish crystalline powder, odorless or slight odor. L-tryptophan has slight bitterness, while DL-tryptophan and D-tryptophan have slight sweet taste. They will decompose at the temperature of 289C, slight soluble in the water and insoluble in alcohol. They can dissolve in the dilute acid or dilute alkali, and colorate if being irradiated for a long time, to produce a small quantity of indole when heated together with water. A large amount of indole will be produced if heated together with sodium hydroxide or cupric sulfate; They are stable if heated together with acid in dark place, however, very easy to decompose if together with other amino acid, saccharide or aldehyde.
2. Uses
Tryptophan is a kind of heterocyclic amino acid, important and necessary for human body, widely used in pharmaceutical and food field, the main uses include:
(1) used in the amino acid transfusion, composite amino acid preparation;
(2) used in nutrient tonic for pregnant women and special milk powder for infants.
(3) used as drug to treat nicotinic acid deficiency disease (pellagra);
(4) used as sedative drug to regulate mental rhythm and perfect sleep quality;
(5) used as food and feed additive;
(6) used to synthesize 5-hydroxytryptamine(MELATONIN).
3Index
Ŀ Item |
Standard |
1 Identification |
Infrared Absorption |
2 Description |
White to slightly yellowish-white crystals or crystalline powder |
3 []25D Specific rotation |
-29.4�-32.8 |
4 Ȼ Chloride |
0.05 |
5 Iron |
30ppm |
6 Sulfate |
0.03 |
7 ؽ Heavy metals |
15ppm |
8 ʧ Loss on drying |
0. 3 |
9 ղ Residue on ignition |
0. 10 |
10 Assay |
98.5101.5 |
11 л Organic volatile impurities |
Meets the requirement |
12 PH |
5.5~7.0 |