L-tryptophan |
Last updated: 18/07/2024
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(Also known as: L-TRP; beta-3-indolylalanine) |
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate |
Ecotoxicity |
Human health |
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A natural substance with potenial for use as a plant growth stimulant |
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Growth |
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Agricultural crops |
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Novel in crop protection |
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Not approved |
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Not applicable |
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved |
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Not applicable |
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Not applicable |
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Not applicable |
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Yes |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
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ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
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LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
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ISIceland |
NONorway |
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L-tryptophan is the L-enantiomer of the amino acid tryptophan. The D-enantiomer is less biologically active. |
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C₁₁H₁₂N₂O₂ |
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C1=CC=C2C(=C1)C(=CN2)CC(C(=O)O)N |
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C1=CC=C2C(=C1)C(=CN2)C[C@@H](C(=O)O)N |
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QIVBCDIJIAJPQS-VIFPVBQESA-N |
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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 |
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Yes |
Cambridge Crystallographic Data Centre diagrams |
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Common Name |
Relationship |
Link |
L-tryptophan |
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Plant Growth Regulator, Other substance |
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Nutraceutical, Micronutrient, Feed additive, Biostimulant |
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Amino acid; Plant- and animal-derived substance |
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Natural |
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A biologically active precursor of auxin and so stimulates auxin synthesis within plants improving growth and productivity. As a source of nitrogen and carbon, L-triptophan supports microbial growth and activity in the rhizosphere |
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L-tryptophan is an amino acid that is made from plant or animal sources |
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Often manufactured by fermentation of a mixture of sugar, indole, and pyruvate using yeast (Hansenula anomala). |
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Biostimulant |
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- |
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Agricultural crops |
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- |
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73-22-3 |
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200-795-6 |
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- |
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6305 |
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204.22 |
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(2S)-2-amino-3-(1H-indol-3-yl)propanoic acid |
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(2S)-2-amino-3-(1H-indol-3-yl)propanoic acid |
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- |
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- |
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Not applicable |
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Not applicable |
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Not applicable |
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Not applicable |
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White powder |
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100000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
High |
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280 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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343 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. |
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Soil adsorption and mobility |
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None
Terrestrial ecotoxicology |
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> 16000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source Rat |
Low |
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HUMAN HEALTH AND PROTECTION |
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> 16000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source Rat |
Low |
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Carcinogen |
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Endocrine disruptor |
XNo, known not to cause a problem |
A0 A = Chromosome aberration (EFSA database) 0 = No data ; B0 B = DNA damage/repair (EFSA database) 0 = No data ; C0 C = Gene mutation (EFSA database) 0 = No data ; D0 D = Genome mutation (EFSA database) 0 = No data ; E3 E = Unspecified genotoxicity type (miscellaneous data source) 3 = Negative |
XNo, known not to cause a problem |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
No data found |
Eye irritant |
Phototoxicant |
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XNo, known not to cause a problem |
No data found |
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Has pharmaceutical application e.g. pain management Large overdoses may cause eosiniophilia-myalgia syndrome thought to be due to impurities |
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Incompatible with strong oxidising agents |
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Not regulated |
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Stable under recommended storage conditions |
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L-tryptophan |
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Record last updated: |
18/07/2024 |
Contact: |
aeru@herts.ac.uk |
Please cite as: |
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |