DL-Tryptophan Chemical Properties

Melting point:

289-290 °C (dec.)(lit.)

alpha 

[α]D20 -1～1°(c=1, dil. HCl)

Boiling point:

342.72°C (rough estimate)

Density 

1.1754 (rough estimate)

refractive index 

1.5200 (estimate)

storage temp. 

Store at RT.

solubility 

methanol: water (7:3): soluble

form 

Powder

pka

2.30±0.10(Predicted)

color 

White to light beige or light yellow

Odor

Odorless

Water Solubility 

10 g/L (20 ºC)

BRN 

86196

Stability:

Stable. Incompatible with strong oxidizing agents, strong acids.

InChIKey

QIVBCDIJIAJPQS-UHFFFAOYSA-N

CAS DataBase Reference

54-12-6(CAS DataBase Reference)

NIST Chemistry Reference

Tryptophane(54-12-6)

EPA Substance Registry System

Tryptophan (54-12-6)

Safety Information

Hazard Codes 

Xi

Risk Statements 

22-36/37/38-37/38-41

Safety Statements 

24/25-36/37/39-36-26

WGK Germany 

1

RTECS 

YN6129200

F 

8

TSCA 

Yes

HS Code 

29339990

MSDS

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DL-Tryptophan Usage And Synthesis

Chemical Properties

White crystals. Slightly soluble in water; stable in alkaline solution; decomposed by strong acids.

Uses

An amino acid precursor of serotonin and melatonin.

Definition

ChEBI: An alpha-amino acid that is alanine bearing an indol-3-yl substituent at position 3.

Safety Profile

Experimental reproductive effects. Questionable carcinogen with experimental carcinogenic data. When heated to decomposition it emits toxic fumes of NOx.

DL-Tryptophan(54-12-6)Related Product Information

• AC-TRP-OET
• DL-5-HYDROXYTRYPTOPHAN
• DL-Tryptophan
• N-Acetyl-DL-tryptophan
• Cyclamic acid
• 3-Indolepropionic acid
• Glycine
• AMINO ACIDS
• 6-Aminocaproic acid
• L-Tryptophan
• Propionic acid
• Molasses
• N-[(tert-Butoxy)carbonyl]-D-tryptophan
• ALTRENOGEST
• 3-Aminopyridine
• DL-Phenylalanine
• β-Alanine
• D(+)-Tryptophan