L-Kynurenine Hydrate - ≥98%(T) , CAS No.2922-83-0

CAS: 2922-83-0 Cat. No.: S138616 Molecular Weight: 208.22(as Anhydrous) Beilstein Registry Number: 14(4)1656
AVAILABLE TO ORDER
GRADE & PURITY ≥98%(T)
Synonyms
CCRIS 4425 | L-kynurenine | SCHEMBL20875 | KYN | AKOS016843487 | beta-Anthraniloyl-L-alanine, L-2-Amino-4-(2-aminophenyl)-4-oxobutanoic acid | DTXSID1074414 | 3-(2-aminobenzoyl)-L-alanine | (alphaS)-alpha,2-diamino-3-hydroxy-gamma-oxo-Benzenebutanoate | (
Storage
Store at -20°C,Argon charged
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
25mg
S138616-25mg
4

$22.90

$34.90
Save $12.00 (34.38%)
100mg
S138616-100mg
1

$70.90

$106.90
Save $36.00 (33.68%)
500mg
S138616-500mg
2

$265.90

$398.90
Save $133.00 (33.34%)
Enter a quantity for the sizes you want to add.
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Why this grade

≥98%(T) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at -20°C,Argon charged Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

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Quality documents

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

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Literature proof

Cited in 16 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

L-Kynurenine is a key intermediate in the breakdown pathway of tryptophan. L-Kynurenine is a substrate of kynureninase, KMO, and KAT associated with the suppression of antitumor immune responses. It has been shown to inhibit allogeneic T-cell proliferation and to increase malignant U87 glioma cell invasion into a collagen matrix.

 

Specifications

Synonyms
CCRIS 4425 | L-kynurenine | SCHEMBL20875 | KYN | AKOS016843487 | beta-Anthraniloyl-L-alanine, L-2-Amino-4-(2-aminophenyl)-4-oxobutanoic acid | DTXSID1074414 | 3-(2-aminobenzoyl)-L-alanine | (alphaS)-alpha, 2-diamino-3-hydroxy-gamma-oxo-Benzenebutanoate | (
Specifications & Purity
≥98%(T)
Biochemical and Physiological Mechanisms
Endogenous AhR agonist. L-Tryptophan metabolite. Suppresses allogeneic T cell proliferation. Centrally active.
Storage
Store at -20°C, Argon charged
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Action Type
AGONIST
Note
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥98%(T)
Names and Identifiers
Pubchem Sid488188330
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488188330
Canonical SmilesC1=CC=C(C(=C1)C(=O)CC(C(=O)O)N)N
IUPAC Name(2S)-2-amino-4-(2-aminophenyl)-4-oxobutanoic acid
InChIKeyYGPSJZOEDVAXAB-QMMMGPOBSA-N
INCHI1S/C10H12N2O3/c11-7-4-2-1-3-6(7)9(13)5-8(12)10(14)15/h1-4,8H,5,11-12H2,(H,14,15)/t8-/m0/s1
Isomeric SMILES C1=CC=C(C(=C1)C(=O)C[C@@H](C(=O)O)N)N
RTECS CY9049700
Molecular Weight 208.22(as Anhydrous)
Beilstein 14(4)1656
Reaxy-Rn 2697333
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2697333&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
SuperclassOrganic oxygen compounds
ClassOrganooxygen compounds
SubclassCarbonyl compounds
Intermediate Tree Nodes Ketones - Aryl ketones - Phenylketones
Direct ParentAlkyl-phenylketones
Alternative Parents Butyrophenones  L-alpha-amino acids  Gamma-keto acids and derivatives  Benzoyl derivatives  Aryl alkyl ketones  Aniline and substituted anilines  Beta-amino ketones  Vinylogous amides  Amino acids  Monocarboxylic acids and derivatives  Carboxylic acids  Organopnictogen compounds  Organic oxides  Monoalkylamines  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents Alkyl-phenylketone - Butyrophenone - Alpha-amino acid - Alpha-amino acid or derivatives - L-alpha-amino acid - Benzoyl - Gamma-keto acid - Aniline or substituted anilines - Aryl alkyl ketone - Monocyclic benzene moiety - Beta-aminoketone - Keto acid - Benzenoid - Vinylogous amide - Amino acid - Amino acid or derivatives - Monocarboxylic acid or derivatives - Carboxylic acid - Carboxylic acid derivative - Primary aliphatic amine - Amine - Hydrocarbon derivative - Organopnictogen compound - Organic oxide - Organic nitrogen compound - Organonitrogen compound - Primary amine - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as alkyl-phenylketones. These are aromatic compounds containing a ketone substituted by one alkyl group, and a phenyl group.
External Descriptors non-proteinogenic L-alpha-amino acid - kynurenine
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
AHR Tclin Aryl hydrocarbon receptor (1071 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
KYNU Tchem Kynureninase (42 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
IDO1 Tchem Indoleamine 2,3-dioxygenase (6650 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
RGS4 Tchem Regulator of G-protein signaling 4 (13867 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Associated Targets(non-human)
Bacillus subtilis (32866 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
ffp 4'-phosphopantetheinyl transferase ffp (24982 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.

29 results found

Lot NumberCertificate TypeDateItem
G2510579Certificate of AnalysisJun 26, 2025 S138616
G2510578Certificate of AnalysisJun 26, 2025 S138616
G2510560Certificate of AnalysisJun 26, 2025 S138616
C2324220Certificate of AnalysisApr 18, 2025 S138616
C2323922Certificate of AnalysisApr 18, 2025 S138616
D2516569Certificate of AnalysisApr 09, 2025 S138616
D2516568Certificate of AnalysisApr 09, 2025 S138616
D2516567Certificate of AnalysisApr 09, 2025 S138616
C2324221Certificate of AnalysisJan 10, 2025 S138616
L2228063Certificate of AnalysisOct 21, 2024 S138616
L2228059Certificate of AnalysisOct 21, 2024 S138616
L2228056Certificate of AnalysisOct 11, 2024 S138616
L2228052Certificate of AnalysisOct 11, 2024 S138616
B2215620Certificate of AnalysisDec 21, 2023 S138616
B2215401Certificate of AnalysisDec 21, 2023 S138616
A2205489Certificate of AnalysisOct 08, 2023 S138616
A2205485Certificate of AnalysisOct 08, 2023 S138616
E2413071Certificate of AnalysisJul 08, 2023 S138616
H2301914Certificate of AnalysisJul 08, 2023 S138616
H2301915Certificate of AnalysisJul 08, 2023 S138616
H2301931Certificate of AnalysisJul 08, 2023 S138616
C2314221Certificate of AnalysisMar 08, 2023 S138616
C2313922Certificate of AnalysisMar 08, 2023 S138616
C2324222Certificate of AnalysisMar 08, 2023 S138616
C2314220Certificate of AnalysisMar 08, 2023 S138616
A2304144Certificate of AnalysisDec 02, 2022 S138616
L2228025Certificate of AnalysisDec 02, 2022 S138616
I2002096Certificate of AnalysisJul 11, 2022 S138616
B2215402Certificate of AnalysisDec 01, 2021 S138616

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Chemical and Physical Properties
Sensitivityair sensitive
Specific Rotation[α]-33° (C=0.4,H2O)
Melt Point(°C)219 °C
Molecular Weight208.210 g/mol
XLogP3-2.200
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count5
Rotatable Bond Count4
Exact Mass208.085 Da
Monoisotopic Mass208.085 Da
Topological Polar Surface Area106.000 Ų
Heavy Atom Count15
Formal Charge0
Complexity255.000
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
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. Wu Hao, Bao Yuling, Yan Tongtong, Huang Hui, Jiang Ping, Zhang Zhan, Li Lei, Wu Qian.  (2022)  PAH-induced metabolic changes related to inflammation in childhood asthma.  ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,  30  (5): (13739-13754).  [PMID:36136199] [10.1007/s11356-022-23091-9]
2. Lu Geng, Zhou Jiawei, Yang Ting, Li Jin, Jiang Xinrui, Zhang Wenjun, Gu Shuangshuang, Wang Jun.  (2022)  Landscape of Metabolic Fingerprinting for Diagnosis and Risk Stratification of Sepsis.  Frontiers in Immunology,      [PMID:35663956] [10.3389/fimmu.2022.883628]
3. Zhenyang Gu, Wenlong Pei, Yonghua Shen, Lijuan Wang, Jun Zhu, Yi Zhang, Shengxian Fan, Qian Wu, Lei Li, Zhan Zhang.  (2021)  Akkermansia muciniphila and its outer protein Amuc_1100 regulates tryptophan metabolism in colitis.  Food & Function,  12  (20): (10184-10195).  [PMID:34532729] [10.1039/D1FO02172A]
4. Yun Chen, Hui Chen, Ganggang Shi, Min Yang, Fuchun Zheng, Zhijie Zheng, Shuyao Zhang, Shilong Zhong.  (2019)  Ultra-performance liquid chromatography-tandem mass spectrometry quantitative profiling of tryptophan metabolites in human plasma and its application to clinical study.  JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES,      [PMID:31586884] [10.1016/j.jchromb.2019.121745]
5. Ning Wang, Jie Zhang, Qiao Li, Hui Xu, Geng Chen, Zhiyong Li, Difa Liu, Xin Yang.  (2019)  Discovery of potent indoleamine 2,3-dioxygenase (IDO) inhibitor from alkaloids in Picrasma quassioides by virtual screening and in vitro evaluation.  FITOTERAPIA,      [PMID:30654128] [10.1016/j.fitote.2019.01.005]
6. Zhang Junzhi, Lin Binyan, Zhang Ying, Hu Xiaochao, Liu Tongtong, Liu E-Hu, Liu Shijia.  (2024)  Baitouweng decoction alleviates ulcerative colitis by regulating tryptophan metabolism through DOPA decarboxylase promotion.  Frontiers in Pharmacology,      [PMID:38974042] [10.3389/fphar.2024.1423307]
7. Liao Shiying, Cheng Jinhua, Zhao Weimin, Dai Chaohui, Fu Yanfeng, Li Bixia, Deng Yanfei, Li Hui.  (2025)  Kynurenine, a derivative of tryptophan, inhibits progesterone biosynthesis in porcine granulosa luteal cells through AHR-mediated downregulation of GATA4, GATA6, and CEBPB.  BIOLOGY OF REPRODUCTION,      [PMID:39927674] [10.1093/biolre/ioaf031]
8. Yiming Sun, Hui Cai, Daofeng Yang, Nengyi Yu, Lejie Sun, Jingxuan Xu, Hongwei Yuan, Rong Yang, Lele Song, Hao Liu, Chengyao Ma, Zhe Liu.  (2024)  β-arrestin2 is indispensable for the antidepressant effects of fluoxetine via inhibiting astrocytic pyroptosis in chronic mild stress mouse model for depression.  EUROPEAN JOURNAL OF PHARMACOLOGY,      [PMID:38834095] [10.1016/j.ejphar.2024.176693]
9. Yvhao Xie, Xinxin Li, Qingshi Meng, Jinjun Li, Xin Wang, Liying Zhu, Weiwei Wang, Xiaoqiong Li.  (2024)  Interplay between gut microbiota and tryptophan metabolism in type 2 diabetic mice treated with metformin.  Microbiology Spectrum,      [PMID:39162538] [10.1128/spectrum.00291-24]
10. Wen-Hao Han, Feng-Bin Zhang, Shun-Xia Ji, Kai-Lu Liang, Jun-Xia Wang, Xiao-Ping Fan, Shu-Sheng Liu, Xiao-Wei Wang.  (2025)  Auxin-salicylic acid seesaw regulates the age-dependent balance between plant growth and herbivore defense.  Science Advances,  11  (19):   [PMID:40344064] [10.1126/sciadv.adu5141]
11. Shiyan Yue, Xiaoming Ye, Tiegui Nan, Chen Li, Luqi Huang, Yuan Yuan.  (2025)  Daidzin from Pueraria thomsonii regulate root plasticity and cell proliferation.  INDUSTRIAL CROPS AND PRODUCTS,      [PMID:] [10.1016/j.indcrop.2025.121228]
12. Jinliang Yao, Rui Cui, Beibei Fang, Sheliang Wang, Xiangsheng Ye, Zhaojun Liu, Fangsen Xu.  (2025)  Transcription factor BnaA1.WRKY53 is involved in regulation of auxin-induced leaf curling under boron deficiency in Brassica napus.  Crop Journal,      [PMID:] [10.1016/j.cj.2025.05.001]
13. Chuzheng Pan, Feng Chen, Yan Yan, Haiwen Li, Chengfeng Qiu.  (2025)  Tryptophan metabolites as biomarkers to predict the severity and prognosis of acute ischemic stroke patients.  Journal of Stroke & Cerebrovascular Diseases,      [PMID:40553901] [10.1016/j.jstrokecerebrovasdis.2025.108382]
14. Feng Chen, Xiaoxia Yang, Yayun Tan, Huanhuan Li, Yan Yan, Xiang Zhao, Chengfeng Qiu.  (2025)  Targeted LC-MS/MS metabolomics reveals distinctive tryptophan pathway signatures in pneumocystis jirovecii pneumonia.  CLINICA CHIMICA ACTA,      [PMID:41232641] [10.1016/j.cca.2025.120716]
15. Mingtao Tan, Rui Qi, Linyi Meng, Shijie Du, Shanchun Yan, Dun Jiang.  (2025)  RNAi-Mediated Nucleic Acid Insecticide Weakens the λ-Cyhalothrin Cross-Tolerance in Hyphantria cunea Induced by Cd Stress.  JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,      [PMID:41457561] [10.1021/acs.jafc.5c11784]
16. Yueqiao Wang, Pengfei Cheng, Ke Jiang, Jiaxin Gong, Ziyu Liu, Wenbiao Shen.  (2026)  Tomato lateral root branching requires Nuclear Architecture Related 1 via auxin signaling, a process involving hydrogen gas.  PLANT JOURNAL,  125  (1): (e70678).  [PMID:41533519] [10.1111/tpj.70678]
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