Skip to Content
Merck
CN
All Photos(1)

Documents

1700501

USP

L-Tryptophan

United States Pharmacopeia (USP) Reference Standard

Sign Into View Organizational & Contract Pricing
All Photos(1)
Synonym(s):
(S)-2-Amino-3-(3-indolyl)propionic acid, L-α-Amino-3-indolepropionic acid
Empirical Formula (Hill Notation):
C11H12N2O2
CAS Number:
73-22-3
Molecular Weight:
204.23
Beilstein:
86197
MDL number:
MFCD00064340
UNSPSC Code:
41116107
PubChem Substance ID:
329751437
NACRES:
NA.24

grade

pharmaceutical primary standard

API family

tryptophan

manufacturer/tradename

USP

mp

280-285 °C (dec.) (lit.)

application(s)

pharmaceutical (small molecule)

format

neat

SMILES string

N[C@@H](Cc1c[nH]c2ccccc12)C(O)=O

InChI

1S/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-/m0/s1

InChI key

QIVBCDIJIAJPQS-VIFPVBQESA-N

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.
For further information and support please go to the website of the issuing Pharmacopoeia.

Application

L-Tryptophan USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia.
Also, for use with USP monographs such as:
  • Tryptophan
  • 5-Hydroxy-l-tryptophan

Other Notes

Amino acid precursor of serotonin and melatonin
Sales restrictions may apply.

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

HPLC Determination of Total Tryptophan in Infant Formula and Adult/Pediatric Nutritional Formula Following Enzymatic Hydrolysis: Single-Laboratory Validation, First Action 2017.03.
Jonathan Draher et al.
Journal of AOAC International, 101(4), 1244-1248 (2018-07-11)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service