L-cysteine |
Last updated: 24/10/2024
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(Also known as: R(+)-cysteine; thioserine; R-cysteine; free cycteine) |
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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L-cysteine is a non-essential amino acid which can be used for the control of leaf cutting ants |
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Leaf cutting ants |
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Crop production; Forestry |
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Current |
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EC Regulation 1107/2009 (repealing 91/414) |
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Approved |
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Open ended |
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No |
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Yes |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
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ISIceland |
NONorway |
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Substance is racemic. |
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C₃H₇NO₂S |
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C(C(C(=O)O)N)S |
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C([C@@H](C(=O)O)N)S |
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XUJNEKJLAYXESH-REOHCLBHSA-N |
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InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1 |
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Yes |
Cambridge Crystallographic Data Centre diagrams |
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Common Name |
Relationship |
Link |
L-cysteine |
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Insecticide |
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Amino acid insecticide; Thiol insecticide |
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Natural |
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Non-essential amino acid derived from animals including goose and duck feathers, human hair, swine bristles and hooves |
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Commercial production of L-cysteine is via the extraction from the acid hydrolysate of hair and feathers. |
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Crop protection |
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Leaf cutting ants |
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Crop production; Forestry |
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52-90-4 |
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200-158-2 |
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5862 |
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121.16 |
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(2R)-2-amino-3-sulfanylpropanoic acid |
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(2R)-2-amino-3-sulfanylpropanoic acid |
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(R)-2-Amino-3-mercaptopropanoic acid |
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FEMA=3263; Approved via EU & UK 'Basic substance' legislation (Article 28 of Regulation (EC) No 1107/2009) |
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Not applicable |
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Not applicable |
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Not known |
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Not applicable |
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None |
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Colourless crystalline solid |
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Used as a mixture with matrix (wheat flour, food grade) |
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280000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source as HCl variant |
High |
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174.1 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source as HCl variant |
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Decomposes before boiling |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source as HCl variant |
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260 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source as HCl variant |
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3.24 X 10-03 |
Calculated |
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-2.49 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source as HCl variant |
Low |
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Rapidly biodegrades in environment |
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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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HUMAN HEALTH AND PROTECTION |
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Noone allocated |
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None allocated |
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None allocated |
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None allocated |
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No risks identified |
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No risks identified |
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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 ; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data |
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 |
XNo, known not to cause a problem |
Eye irritant |
Phototoxicant |
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✓Yes, known to cause a problem |
XNo, known not to cause a problem |
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Serious eye irritant |
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When heated to decomposition it emits toxic gases of sulphur and nitrogen oxides |
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Not listed (Not listed) |
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L-cysteine |
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Record last updated: |
24/10/2024 |
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 |