L-Tryptophan 73-22-3

L-Tryptophan 73-22-3


  • Catalogue No.: 10987
  • Product Name: L-Tryptophan
  • Synonyms: H-Trp-OH
  • CAS: 73-22-3
  • EC: 200-795-6
  • MDL: MFCD00064340
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  • Price: $1000/5kg
  • Price(bulk): This email address is being protected from spambots. You need JavaScript enabled to view it.


Standard: USP24
Assay: 98.5~101.5%
Appearance: white crystalline powder
pH: 5.5~7.0
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.

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