Tryptophan (data page)

The complete data for Tryptophan

General information

Chemical formula: C₁₁H₁₂N₂O₂
Molar mass: 204.23 g·mol⁻¹
Systematic name:
(S)-2-Amino-3-(1H-indol-3-yl)-propanoic acid
Abbreviations: W, Trp
Synonyms:
none

Database data

SMILES: C(N)(C(=O)O)CC1c2ccccc2NC=1
InChI=1/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)/t9-/m1/s1/f/h14H

1/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/f/h5H

ATC: N/A

CAS: 73-22-3

DrugBank: N/A

EINECS:
200-795-6 ^a

PubChem: 9060 (D)^a, 6305 (L)^a

Physical properties

Structure

Crystal data

Spectral data

UV-Vis

NMR

MS
- Masses of main fragments:
GMD MS Spectrum

Phase behavior

Solid properties

ρ_solid: 1.34 g.cm⁻³
T_m: 228 °C

Liquid properties

Gas properties

Hazard properties

MSDS N/A

Main hazards:

- N/A

NFPA 704

Flash point

- N/A

R/S statement

R: N/A
S: N/A

RTECS number:
N/A

Chemical properties

XLogP: -1.3

pI: 5.89

pK_a: 2.38, 9.34

Tautomers:

Hydrogen bond: donor - 3; acceptor - 4

Pharmacological properties

Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

References

^a 73-22-3 EINECS for Tryptophan
^a CID 9060 from PubChem
^a CID 6305 from PubChem

The encoded amino acid

General topics

By properties

Aliphatic	Branched-chain amino acids (Valine Isoleucine Leucine) Methionine Alanine Proline Glycine

Aromatic	Phenylalanine Tyrosine Tryptophan Histidine

Polar, uncharged	Asparagine Glutamine Serine Threonine

Positive charge (pK_a)	Lysine (≈10.8) Arginine (≈12.5) Histidine (≈6.1)

Negative charge (pK_a)	Aspartic acid (≈3.9) Glutamic acid (≈4.1) Cysteine (≈8.3) Tyrosine (≈10.1)

Other classifications

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