|Chemical Name or Material||DL-Tryptophan|
|Assay Percent Range||98%|
|Other Amino Acids||(TLC) Not detected|
|Molecular Weight (g/mol)||204.229|
|Physical Form||Crystalline Powder|
|Color||Beige to White or Yellow|
|Appearance of Solution||(1% in 1M HCl) clear to slightly hazy, colorless to yellow solution|
|Loss on Drying||0.8% max. (105°C, 3 hrs) (vacuum)|
|Synonym||dl-tryptophan, 2-amino-3-1h-indol-3-yl propanoic acid, racemic tryptophan, dl-trytophane, dl-trytophan, +--tryptophan, h-dl-trp-oh, dl-3beta-indolylalanine, dl-tryptophane, tryptophan .|
|IUPAC Name||2-amino-3-(1H-indol-3-yl)propanoic acid|
Appearance: White to off-white powder
Product Quality meets: Our company standards.
Stock status: Usually keep 300-400KGs in stock.
Application: it is widely used in food additives, pharmaceutical intermediate.
Package: 25kg / barrel
Customs Code: 29339990
Hazard class code: R22
Safety instruction: S24 / 25
Dangerous goods mark: Xi 
1. Indole was condensed to form 3-dimethylaminomethyl indole, and then condensed to form ethyl α - carboxylate - β (3-indole) - N-acetyl - α - alanine ethyl ester, which was hydrolyzed, decarboxylated and then hydrolyzed to form DL tryptophan.
2. Tryptophan was synthesized from indole in high concentration of pyruvic acid and ammonia under the catalysis of enzyme. Or it is prepared from indole and acetylamino malonate.