DL-Tryptophan - ≥99% , CAS No.54-12-6

CAS: 54-12-6 Cat. No.: T103482 Molecular Weight: 204.23 Beilstein Registry Number: 86199 EC Number: 200-194-9
AVAILABLE TO ORDER
GRADE & PURITY ≥99%
Synonyms
(+/-)-alpha-Amino-3-indolepropionic acid | (r)-(+)l-trp | ACon1_001815 | FT-0627592 | NCGC00015994-05 | Tox21_202793 | DL-Tryptophan | (+/-)-Tryptophan | DTXSID0021418 | BSPBio_002938 | STK029637 | NSC13118 | NSC-13118 | SDCCGMLS-0066645.P001 | DTXCID4014
Storage
Protected from light,Desiccated,Room temperature
Shipped In
Normal
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Size
Status
Price
Qty
5g
T103482-5g
1
$9.90
25g
T103482-25g
1
$10.90
100g
T103482-100g
5

$36.90

$55.90
Save $19.00 (33.99%)
500g
T103482-500g
1

$137.90

$206.90
Save $69.00 (33.35%)
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Why this grade

≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Protected from light,Desiccated,Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 22 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

An amino acid precursor of serotonin and melatonin.


application:

DL-Tryptophan is an amino acid precursor of serotonin and melatonin. It is a dietary supplement for use as an antidepressant, anxiolytic, and sleep aid. DL-tryptophan also can be used as feed nutrition enhancer, antioxidants.

Specifications

Synonyms
(+/-)-alpha-Amino-3-indolepropionic acid | (r)-(+)l-trp | ACon1_001815 | FT-0627592 | NCGC00015994-05 | Tox21_202793 | DL-Tryptophan | (+/-)-Tryptophan | DTXSID0021418 | BSPBio_002938 | STK029637 | NSC13118 | NSC-13118 | SDCCGMLS-0066645.P001 | DTXCID4014
Specifications & Purity
≥99%
Storage
Protected from light, Desiccated, Room temperature
Shipped In
Normal
Purity
≥99%
Names and Identifiers
Pubchem Sid504750472
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504750472
Canonical SmilesC1=CC=C2C(=C1)C(=CN2)CC(C(=O)O)N
IUPAC Name2-amino-3-(1H-indol-3-yl)propanoic acid
InChIKeyQIVBCDIJIAJPQS-UHFFFAOYSA-N
INCHI1S/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)
Isomeric SMILES C1=CC=C2C(=C1)C(=CN2)CC(C(=O)O)N
WGK Germany 1
RTECS YN6129200
Molecular Weight 204.23
Beilstein 86199
Reaxy-Rn 86196
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=86196&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassIndoles and derivatives
SubclassIndolyl carboxylic acids and derivatives
Intermediate Tree Nodes Not available
Direct ParentIndolyl carboxylic acids and derivatives
Alternative Parents Alpha amino acids  3-alkylindoles  Aralkylamines  Substituted pyrroles  Benzenoids  Heteroaromatic compounds  Amino acids  Monocarboxylic acids and derivatives  Carboxylic acids  Azacyclic compounds  Organopnictogen compounds  Organic oxides  Monoalkylamines  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Indolyl carboxylic acid derivative - Alpha-amino acid - Alpha-amino acid or derivatives - 3-alkylindole - Indole - Aralkylamine - Benzenoid - Substituted pyrrole - Heteroaromatic compound - Pyrrole - Amino acid or derivatives - Amino acid - Carboxylic acid derivative - Carboxylic acid - Monocarboxylic acid or derivatives - Azacycle - Amine - Primary aliphatic amine - Hydrocarbon derivative - Organic oxide - Organic oxygen compound - Organic nitrogen compound - Carbonyl group - Organonitrogen compound - Organooxygen compound - Primary amine - Organopnictogen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as indolyl carboxylic acids and derivatives. These are compounds containing a carboxylic acid chain (of at least 2 carbon atoms) linked to an indole ring.
External Descriptors alpha-amino acid - aromatic amino acid - aminoalkylindole
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
ALOX15 Tchem Arachidonate 15-lipoxygenase (7108 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CYP3A4 Tclin Cytochrome P450 3A4 (53859 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
A498 (42825 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CAKI-1 (44928 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CCRF-CEM (65223 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
COLO 205 (50209 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
DLD-1 (17511 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
DMS-273 (14108 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HL-60 (67320 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HT-29 (80576 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
K562 (73714 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
KM12 (47707 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
MCF7 (126967 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
MOLT-4 (49676 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
OVCAR-3 (48710 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
OVCAR-4 (44535 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
OVCAR-5 (45555 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
OVCAR-8 (47708 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
RPMI-8226 (44974 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
RXF 393 (41971 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SF-295 (48000 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SK-MEL-2 (46422 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SK-MEL-28 (48833 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SK-MEL-5 (47095 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SK-OV-3 (52876 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SN12C (47755 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SNB-19 (46794 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SNB-78 (14240 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
U-251 (51189 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
UACC-257 (46019 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
UACC-62 (47335 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
UO-31 (46270 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
XF498 (12972 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
A549 (127892 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
NCI/ADR-RES (33767 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
EKVX (44102 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
NCI-H322M (45589 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HCC 2998 (41480 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HCT-116 (91556 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HOP-18 (11577 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HOP-92 (41141 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
NCI-H460 (60772 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SF-268 (49410 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
IGROV-1 (47897 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
KM-20L2 (14967 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
LOX IMVI (44321 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HOP-62 (47048 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
M19-MEL (15326 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Malme-3M (44254 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
SNB-75 (44215 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Associated Targets(non-human)
P388 (20296 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
P388/ADR (1216 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mapt Microtubule-associated protein tau (6 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

13 results found

Lot NumberCertificate TypeDateItem
I2215427Certificate of AnalysisJun 15, 2026 T103482
I2215639Certificate of AnalysisJun 15, 2026 T103482
I2215640Certificate of AnalysisJun 15, 2026 T103482
I2215642Certificate of AnalysisJun 15, 2026 T103482
L2102094Certificate of AnalysisSep 09, 2025 T103482
L2102095Certificate of AnalysisSep 09, 2025 T103482
C1723027Certificate of AnalysisNov 11, 2024 T103482
K2009051Certificate of AnalysisSep 14, 2024 T103482
D2518547Certificate of AnalysisJul 27, 2024 T103482
D2518548Certificate of AnalysisJul 27, 2024 T103482
D2518549Certificate of AnalysisJul 27, 2024 T103482
K2526596Certificate of AnalysisJun 29, 2024 T103482
K2526601Certificate of AnalysisJun 29, 2024 T103482

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Chemical and Physical Properties
SolubilityDL-Tryptophan is an amino acid precursor of serotonin and melatonin.Soluble I water. 10 g/L (20°C), Hcl and alkalies. Sparingly soluble in alcohol.
SensitivityLight sensitive.
Melt Point(°C)289-290 °C
Molecular Weight204.220 g/mol
XLogP3-1.100
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count3
Rotatable Bond Count3
Exact Mass204.09 Da
Monoisotopic Mass204.09 Da
Topological Polar Surface Area79.100 Ų
Heavy Atom Count15
Formal Charge0
Complexity245.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count1
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
1. Yining Zhu, Xinmu Li, Zhaoye Bai, Yujia Zeng, Han Jiang, Xiaoping Bai, Ruijun Li.  (2023)  Fabrication and application of graphene oxide modified cyclodextrin chiral separation membranes.  NEW JOURNAL OF CHEMISTRY,  47  (25): (11852-11858).  [PMID:] [10.1039/D3NJ01309J]
2. Yutong Li, Xinhui Gu, Jiayin Zhao, Fengna Xi.  (2022)  Fabrication of a Ratiometric Fluorescence Sensor Based on Carbon Dots as Both Luminophores and Nanozymes for the Sensitive Detection of Hydrogen Peroxide.  MOLECULES,  27  (21): (7379).  [PMID:36364206] [10.3390/molecules27217379]
3. Huixian Liu, Xin Qiu, Jian Ke, Wenbei Chen, Xiaoping Bai, Yibing Ji, Jianqiu Chen.  (2022)  High mechanical strength conductive inorganic–organic composite membranes for chiral separation and in situ cleaning.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2022.121880]
4. Jian Zhang, Lingling Liang, Yanqing Miao, Yang Yang, Xin Bao, Chunye Liu.  (2022)  Open-tubular capillary electrochromatography with hydroxypropyl-β-cyclodextrin imprinted polymers: hybrid polyhedral oligomeric silsesquioxane as a coating for enantioseparation.  RSC Advances,  12  (16): (9637-9644).  [PMID:35424918] [10.1039/D2RA00079B]
5. Huan Luo, Xiaoping Bai, Huixian Liu, Xin Qiu, Jianqiu Chen, Yibing Ji.  (2021)  β-Cyclodextrin covalent organic framework modified-cellulose acetate membranes for enantioseparation of chiral drugs.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2021.120336]
6. You Dou, Ran Yang, Yue Xiao, Jiao Wu, Lingbo Qu, Yuanqiang Sun, Zhaohui Li.  (2021)  Teaching a fluorophore new tricks: Exploiting the light-driven organic oxidase nanozyme properties of thiazolothiazole for highly sensitive biomedical detection.  SENSORS AND ACTUATORS B-CHEMICAL,      [PMID:] [10.1016/j.snb.2021.131226]
7. Shaoping Ma, Fenfang Li, Zhijian Tan.  (2021)  Enantioselective liquid-liquid extraction of tryptophan enantiomers by a recyclable aqueous biphasic system based on stimuli-responsive polymers.  JOURNAL OF CHROMATOGRAPHY A,      [PMID:34525428] [10.1016/j.chroma.2021.462532]
8. Pengcheng Peng, Lifu Liao, Zhaohui Yu, Min Jiang, Jian Deng, Xilin Xiao.  (2019)  A novel sensor based on multi-walled carbon nanotubes and boron-doped double-layer molecularly imprinted membrane for the analysis of SCZ in pharmaceutical and biological samples.  INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY,      [PMID:] [10.1080/03067319.2019.1622697]
9. Jianwei Bai, Wenpan Zhang, Xiaofei Ma, Longqi Chen, Lijia Liu, Chunhong Zhang.  (2019)  Synthesis of novel hyper-cross-linked chiral porous polymers and their applications in enantioselective adsorption of amino acids.  MICROPOROUS AND MESOPOROUS MATERIALS,      [PMID:] [10.1016/j.micromeso.2019.109892]
10. Xiao-Rong Yang, Li Lei, Zhuo Peng, Hai-Rong Yu, Chang-Jing Cheng.  (2019)  Magnetic carbon nanotubes grafted with smart polymer brushes for highly efficient enantioseparation of tryptophan enantiomers.  Analytical Methods,  11  (47): (5953-5962).  [PMID:] [10.1039/C9AY01736D]
11. Zhu Han-Yan, Song Xiao-Dong, Yang Xiao-Rong, Cheng Chang-Jing, Yu Hai-Rong, Zhang Huai-Hao.  (2018)  Smart chiral magnetic nanoparticles for highly efficient enantioseparation of tryptophan enantiomers.  JOURNAL OF MATERIALS SCIENCE,  54  (4): (2960-2974).  [PMID:] [10.1007/s10853-018-3072-z]
12. Xiao-Rong Yang, Xiao-Dong Song, Han-Yan Zhu, Chang-Jing Cheng, Hai-Rong Yu, Huai-Hao Zhang.  (2018)  Novel Smart Polymer-Brush-Modified Magnetic Graphene Oxide for Highly Efficient Chiral Recognition and Enantioseparation of Tryptophan Enantiomers.  ACS Applied Bio Materials,      [PMID:34996147] [10.1021/acsabm.8b00294]
13. Qing Xiong, Jing Jin, Liqiong Lv, Zhisi Bu, Shengqiang Tong.  (2018)  Chiral ligand exchange countercurrent chromatography: Enantioseparation of amino acids.  JOURNAL OF SEPARATION SCIENCE,  41  (6): (1479-1488).  [PMID:29323783] [10.1002/jssc.201701117]
14. Hongjuan Wang, Duo Qian, Xilin Xiao, Bo He, Shuqin Gao, Han Shi, Lifu Liao, Jian Deng.  (2017)  Enantioselective determination of S-ornidazole by using carbon paste electrode modified with boron-embedded conductive copolymer-polysiloxane-based molecularly imprinted hybrid film.  ELECTROCHIMICA ACTA,      [PMID:] [10.1016/j.electacta.2017.06.064]
15. Lian-Di Guo, Ya-Ya Song, Hai-Rong Yu, Li-Ting Pan, Chang-Jing Cheng.  (2017)  Novel smart chiral magnetic microspheres for enantioselective adsorption of tryptophan enantiomers.  APPLIED SURFACE SCIENCE,      [PMID:] [10.1016/j.apsusc.2017.02.121]
16. Lu Zhang, Jun-qing Yang, Ying Luo, Jing-chuan Shang, Xin-hui Jiang.  (2015)  Simultaneous determination of eleven compounds related to metabolism of bioamines in rat cortex and hippocampus by HPLC-ECD with boron-doped diamond working electrode.  JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS,      [PMID:26512998] [10.1016/j.jpba.2015.10.020]
17. Xiaoli Qin, Wenjuan Guo, Huijing Yu, Juan Zhao, Meishan Pei.  (2015)  A novel electrochemical aptasensor based on MWCNTs–BMIMPF6 and amino functionalized graphene nanocomposite films for determination of kanamycin.  Analytical Methods,  (13): (5419-5427).  [PMID:] [10.1039/C5AY00713E]
18. Xuan Zhang, Fang Wang, Zilin Chen.  (2024)  Electrochemical chiral sensor for recognition of amino acid enantiomers with cyclodextrin-based microporous organic networks.  ANALYTICA CHIMICA ACTA,      [PMID:38969416] [10.1016/j.aca.2024.342879]
19. Xinwei Peng, Yongming Wei, Yangfeng Peng, Hongliang Zhao, Tianzhong Tong, Quan He.  (2024)  Enantiomeric separation of tryptophan via novel chiral polyamide composite membrane.  CHIRALITY,  36  (5): (e23674).  [PMID:38699859] [10.1002/chir.23674]
20. Jinmin Wang, Chenkai Chu, Mingming Fang, Yongxin Tao, Yong Qin, Zheng Liang.  (2025)  Functional Covalent Organic Framework Nanosheets for Ratiometric Monitoring of Pseudomonas aeruginosa Biomarker with Deep Learning-Assisted Assay.  ACS Applied Nano Materials,      [PMID:] [10.1021/acsanm.4c06919]
21. Xiaoyu Chen, Baian Ji, Meiling Zhou, Hanwen Deng, Min Wang, Zhining Xia.  (2025)  Affinity Capillary Electrophoresis Based on Receptor Quasi-Immobilization for the Study of Interactions Between Drugs and Serum Albumin.  JOURNAL OF SEPARATION SCIENCE,  48  (4): (e70142).  [PMID:40259547] [10.1002/jssc.70142]
22. Zenghui Xie, Jiana Lin, Yuling Hu, Gongke Li.  (2025)  Pore Segmentation Strategy of Calixarene-Based Covalent Organic Frameworks for Chiral Selective Transmembrane Transport of Amino Acids.  ANALYTICAL CHEMISTRY,      [PMID:41251229] [10.1021/acs.analchem.5c05490]
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