dimethachlor (Ref: CGA 17020) |
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GENERAL INFORMATION
for dimethachlor
Description: A herbicide used pre-emergence to control most annual grasses and broad-leaved weeds
Example pests controlled: Loose silky-bent; Meadow grass; Brome; Slender foxtail; Common chickweed; Red dead-nettle; Mayweed
Example applications: Winter oilseed rape; Soybeans; Sugarbeet
Efficacy & activity: -
Availability status: Current
Introduction & key dates: 1977
EC Regulation 1107/2009 (repealing 91/414):
Status | Approved |
Dossier rapporteur/co-rapporteur | Hungary/Austria |
Date inclusion expires | 31/12/2021 |
EU Candidate for substitution (CfS) | No |
Approved for use () or known to be used (
) in the following European countries:
AT |
BE |
BG |
CY |
CZ |
DE |
DK |
EE |
EL |
ES |
FI |
FR |
HR |
HU |
IE |
IT |
LT |
LU |
LV |
MT |
NL |
PL |
PT |
RO |
SE |
SI |
SK |
UK |
Pesticide type | Herbicide | |||
Substance group | Chloroacetamide | |||
Minimum active substance purity | - | |||
Known relevant impurities | - | |||
Substance origin | Synthetic | |||
Mode of action | Selective, absorbed by new shoots of seedlings and roots. Inhibition of VLCFA (inhibition of cell division) | |||
CAS RN | 50563-36-5 | |||
EC number | 256-625-6 | |||
CIPAC number | 688 | |||
US EPA chemical code | - | |||
Isomerism | - | |||
Chemical formula | C13H18ClNO2 | |||
SMILES | ClCC(=O)N(c1c(cccc1C)C)CCOC | |||
International Chemical Identifier key (InChIKey) | SCCDDNKJYDZXMM-UHFFFAOYSA-N | |||
International Chemical Identifier (InChI) | InChI=1S/C13H18ClNO2/c1-10-5-4-6-11(2)13(10)15(7-8-17-3)12(16)9-14/h4-6H,7-9H2,1-3H3 | |||
Structure diagram/image available? | Yes | |||
Molecular mass (g mol-1) | 255.74 | |||
PIN (Preferred Identification Name) | 2-chloro-N-(2,6-dimethylphenyl)-N-(2-methoxyethyl)acetamide | |||
IUPAC name | 2-chloro-N-(2-methoxyethyl)acet-2',6'-xylidide | |||
CAS name | 2-chloro-N-(2,6-dimethylphenyl)-N-(2-methoxyethyl)acetamide | |||
Other status information | - | |||
Herbicide Resistance Classification (HRAC) | K3 | |||
Herbicide Resistance Classification (WSSA) | 15 | |||
Insecticide Resistance Classification (IRAC) | Not applicable | |||
Fungicide Resistance Classification (FRAC) | Not applicable | |||
Examples of recorded resistance | - | |||
Physical state | Colourless crystals | |||
Related substances & organisms | - |
Formulations:
ENVIRONMENTAL FATE
for dimethachlor
Key metabolites:
Metabolite | Formation medium | Estimated maximum occurrence fraction | 1107/2009 relevancy ![]() |
|
N-(2,6-dimethylphenyl)-N-(2-methoxyethyl)oxalamic acid (Ref: CGA 50266) ![]() |
Soil | 0.355 | Major fraction, Relevant | |
((2,6-dimethylphenyl)-2-methoxyethyl)carbamoyl)methanesulfonic acid sodium salt (Ref: CGA 354742) ![]() |
Soil | 0.158 | Major fraction, Relevant |
Other known metabolites:
Metabolite name and reference | Aliases | Formation medium / Rate | Estimated maximum occurrence fraction | Metabolising enzymes |
IMPURITY | - | - | - | - |
N-carboxymethyl-N-(2,6-dimethyl-phenyl)oxalamic acid (Ref: CGA 102935) Note: Risk to groundwater |
- | Soil (Aerobic) | - | - |
(2,6-dimethylphenylcarbamoyl)-methanesulfonic acid sodium salt (Ref: CGA 369873) Note: Detected in lysimeter leachate; Risk to groundwater |
- | Soil (Aerobic); Groundwater | - | - |
[(2,6-dimethylphenyl)-(2-sulfo-acetyl)amino]acetic acid sodium salt (Ref: CGA 373464) Note: Detected in lysimeter leachate; Risk to groundwater |
- | Soil (Aerobic) | - | - |
N-(2,6-dimethylphenyl)-N-(2-methoxyethyl)acetamide (Ref: CGA 42443) |
- | Soil (Anaerobic); Water/sediment | - | - |
2,6-dimethylaniline (Ref: CGA 72649) |
- | Not applicable | - | - |
3-{2-[(2,6-dimethyl-phenyl)-(2-hy-droxyacetyl)amino]ethylsulfanyl}-2-hydroxypropionic acid (Ref: SYN 528702) Note: Risk to groundwater |
- | Soil (Aerobic) | - | - |
2-[(2-hydroxyacetyl)-(2-methoxy-ethyl)amino]-3-methylbenzoic acid (Ref: SYN 530561) Note: Detected in lysimeter leachate; Risk to groundwater |
- | Soil (Aerobic) | - | - |
ECOTOXICOLOGY
for dimethachlor
HUMAN HEALTH AND PROTECTION
for dimethachlor
General:
Property ![]() |
Value | Source/Quality Score/Other Information ![]() |
Interpretation ![]() |
|
Threshold of Toxicological Concern (Cramer Class) ![]() |
High (class III) | - | - | |
Mammals - Acute oral LD50 (mg kg-1) | 1600 | A5 Rat | Moderate | |
Mammals - Dermal LD50 (mg kg-1 body weight) | > 2000 | A5 Rat | - | |
Mammals - Inhalation LC50 (mg l-1) | > 4.45 | A5 Rat, 4 hr (nose only) | - | |
Other Mammal toxicity endpoints | - | - | ||
ADI - Acceptable Daily Intake (mg kg-1bw day-1) | 0.1 | A5 Rat, SF=100 | - | |
ARfD - Acute Reference Dose (mg kg-1bw day-1) | 0.5 | A5 Rat, SF=100 | - | |
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) | 0.1 | A5 Dog, SF=100 | - | |
Dermal penetration studies (%) | 3.0-10.0 | A5 concentration dependent | - | |
Dangerous Substances Directive 76/464 | - | - | - | |
Exposure Limits | - | - | - | |
Exposure Routes | Public | No unacceptable risks to bystanders identified | ||
Occupational | No unacceptable risks to operators or other workers identified | |||
European MRLs | Click here for the EU MRL pesticide database | |||
Drinking Water MAC (μg l-1) | 0.1 | EU Dir 89/778/EC limit; A5 | - |
Health issues:
Carcinogen | Mutagen | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
- |
- |
|||||||
Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
- |
|
|||||||
General human health issues | No further information available |
: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found
Handling issues:
Language | Name |
English | dimethachlor |
French | dimethachlore |
German | Dimethachlor |
Danish | dimethachlor |
Italian | dimetaclor |
Spanish | dimetacloro |
Greek | dimethachlor |
Slovenian | dimetaklor |
Polish | dimetachlor |
Swedish | - |
Hungarian | dimetaklor |
Dutch | - |
Record last updated: Thursday 04 January 2018
Contact: aeru@herts.ac.uk