Dimethametryn (Ref: C 18898) |
![]() Last updated: 14/01/2021 |
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(Also known as: dimethametryne; dimethametorin) |
SUMMARY |
Dimethametryn is a rice herbicide without EU regulatory approval for use. It has a moderate aqueous solubility and, based on its chemical properties, it only slightly mobile and would not be expected to leach to groundwater. It tends to be persistent in soil systems and may also persist in aqueous systems. It is not susceptible to hydrolysis. It has a low mammalian toxicity and is a recognised irritant. It is moderately toxic to fish, aquatic invertebrates and honey bees. |
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Used to control broad-leaved weeds and grasses in rice and other crops | |
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Couch grass; Crabgrass; Pigweed | |
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Rice; Vegetables including cabbage, aubergine; Tomatoes; Tea; Sugarcane | |
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Unknown | |
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circa 1972 |
UK regulatory status |
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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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No | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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Dimethametryn is a chiral molecule and the technical material is an isomeric mixture. | |
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C₁₁H₂₁N₅S | |
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CCNC1=NC(=NC(=N1)SC)NC(C)C(C)C | |
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No data | |
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IKYICRRUVNIHPP-UHFFFAOYSA-N | |
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InChI=1S/C11H21N5S/c1-6-12-9-14-10(13-8(4)7(2)3)16-11(15-9)17-5/h7-8H,6H2,1-5H3,(H2,12,13,14,15,16) | |
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Yes |
General status |
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Herbicide | |
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Methylthiotriazine | |
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Synthetic | |
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Selective, absorbed by roots and foliage. Inhibits photosynthesis (photosystem II). | |
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22936-75-0 | |
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245-337-6 | |
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None allocated | |
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080815 | |
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31573 | |
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255.38 | |
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rac-N2-ethyl-N4-[(2R)-3-methylbutan-2-yl]-6-(methylsulfanyl)-1,3,5-triazine-2,4-diamine | |
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(RS)-N2-(1,2-dimethylpropyl)-N4-ethyl-6-methylthio-1,3,5-triazine-2,4-diamine | |
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N-(1,2-dimethylpropyl)-N'-ethyl-6-(methylthio)-1,3,5-triazine-2,4-diamine | |
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C1 | |
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5 | |
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Not applicable | |
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Not applicable | |
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Colourless crystalline solid |
Formulations |
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50 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) at 25 °C3 = Unverified data of known source |
Moderate | ||||||||
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650000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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800000 | L3 L = Pesticide manuals and hard copy reference books / other sources Dichloromethane3 = Unverified data of known source |
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60000 | L3 L = Pesticide manuals and hard copy reference books / other sources Hexane3 = Unverified data of known source |
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700000 | L3 L = Pesticide manuals and hard copy reference books / other sources Methanol3 = Unverified data of known source |
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65 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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151 | L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source |
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Not expected to self ignite; Not highly flammable | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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7.94 X 1003 | Calculated | - | |||||||
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3.90 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
High | ||||||||
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1.11 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
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Degradation |
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140 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Persistent | |||||||
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140 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Persistent | ||||||||
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Best available data | ||||||||||
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Stable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Stable | |||||||
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Stable pH 5 to pH 9 over 28 days, 70 °C | ||||||||||
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Soil adsorption and mobility |
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- | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
Slightly mobile | |||||||
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3427 | ||||||||||
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Estimated | ||||||||||
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Fate indices |
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1.00 | Calculated | Low leachability | ||||||||||||||||||||||||||
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2.06 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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High | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
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> 3000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Low | ||||||||
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5.0 | L3 L = Pesticide manuals and hard copy reference books / other sources Oncorhynchus mykiss3 = Unverified data of known source |
Moderate | ||||||||
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0.92 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
Moderate | ||||||||
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100 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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> 3000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Low | ||||||||
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3000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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5.4 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.01 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Health issues |
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Harmful if ingested |
Handling issues |
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IMDG Transport code 9 | |||
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N - Dangerous for the environment: R50/53 | |||
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S61 | |||
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III (Slightly hazardous) | |||
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3077 | |||
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Packaging Group III (minor danger) |
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dimethametryn | ||
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dimethametryne | ||
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Dimethametryn | ||
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dimetrametrina | ||
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Record last updated: | 14/01/2021 |
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 |