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Name: L-Tryptophan
English synonym: L-Trp-OH
CAS Number: 73-22-3
Molecular formula: C11H12N2O2
Molecular weight: 204.23
EINECS number: 200-795-6
Melting point: 289-290°C(dec.)(lit.)
Specific rotation: -31.1º(c=1,H20)
Boiling point: 342.72°C(rough estimate)
Density: 1.34
Refractive index: -32°(C=1,H2O)
Storage conditions: 2-8°C
Solubility: 20%NH3: 0.1g/mL at 20°C, clear, colorless
Acidity coefficient (pKa): 2.46(at25ºC)
Form: powder
Color: White to yellow-white
PH value: 5.5-7.0 (10g/l, H2O, 20ºC)
Optical activity: [α]20/D31.5±1°,c=1%inH2O
Water solubility: 11.4g/L(25ºC)
Stability: Stable. Incompatible with strong acids, strong oxidizing agents.
Amino acid drugs. Used for amino acid infusion. It is often used in combination with iron, vitamins, etc., and with VB6 to improve depression and prevent rough skin disease; as an insomnia sedative and L-dopa for the treatment of Parkinson's disease. It is carcinogenic to laboratory animals; it has adverse reactions such as nausea, anorexia, and wheezing. Avoid combined use with monoamine oxidase inhibitors.