Butachlor (Ref: CP 53619) |
![]() Last updated: 02/01/2021 |
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(Also known as: amichlor; CP 53619; rasayanchlor) |
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A herbicide used for pre-emergence control of annual grasses and some broad-leaved weeds particularly in rice crops | |
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Barnyardgrass; Crab grass; Torpedo grass; Witchgrass; Red deadnettle | |
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Rice; Wheat; Barley; Peanuts | |
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Unknown | |
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circa 1970 |
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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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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C₁₇H₂₆ClNO₂ | |
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CCCCOCN(C1=C(C=CC=C1CC)CC)C(=O)CCl | |
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No data | |
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HKPHPIREJKHECO-UHFFFAOYSA-N | |
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InChI=1S/C17H26ClNO2/c1-4-7-11-21-13-19(16(20)12-18)17-14(5-2)9-8-10-15(17)6-3/h8-10H,4-7,11-13H2,1-3H3 | |
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Yes |
General status |
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Herbicide | |
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Chloroacetamide | |
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Synthetic | |
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Selective, systemic absorbed primarily via germinating shoots. Inhibition of VLCFA (inhibition of cell division) | |
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23184-66-9 | |
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245-477-8 | |
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354 | |
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112301 | |
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31677 | |
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311.9 | |
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N-(butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide | |
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N-butoxymethyl-2-chloro-2',6'-diethylacetanilide | |
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N-(butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide | |
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K3 | |
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15 | |
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Not applicable | |
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Not applicable | |
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Oily liquid of variable colour |
Formulations |
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Usually supplied as an emulsifiable concentrate or as granules. |
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20 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low | ||||||||
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-0.55 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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156 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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165 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Not expected to self ignite; Not highly flammable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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3.16 X 1004 | Calculated | - | |||||||
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4.5 | CA3 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) 3 = Unverified data of known source |
High | ||||||||
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1.08 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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0.24 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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3.74 X 10-03 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Non-volatile | ||||||||
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Degradation |
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56 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Moderately persistent | |||||||
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11.5 | R4 R = Peer reviewed scientific publications 4 = Verified data |
Non-persistent | ||||||||
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General literature states DT₅₀ 4 days to 18 days (R4) | ||||||||||
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Soil adsorption and mobility |
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- | H3 H = The US ARS pesticide properties database (click here ) 3 = Unverified data of known source |
Slightly mobile | |||||||
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700 | ||||||||||
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Best available data | ||||||||||
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Fate indices |
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1.23 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.91 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
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2.4 | J4 J = Pesticide Action Network database (click here ) (Other literature Log BCF range -1.5-0.8 (R3))4 = Verified data |
Low potential | |||||||
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1.7 | - | |||||||||
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2000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Moderate | ||||||||
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> 4640 | L3 L = Pesticide manuals and hard copy reference books / other sources Anas platyrhynchos3 = Unverified data of known source |
Low | ||||||||
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> 0.44 | L3 L = Pesticide manuals and hard copy reference books / other sources Lepomis macrochirus3 = Unverified data of known source |
Moderate | ||||||||
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0.025 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Danio rerio 30 day3 = Unverified data of known source |
Moderate | ||||||||
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> 2.4 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
Moderate | ||||||||
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> 0.19 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Americamysis bahia3 = Unverified data of known source |
Moderate | ||||||||
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> 0.2 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Scenedesmus quadricauda4 = Verified data |
Moderate | ||||||||
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> 100 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | |||||||
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> 100 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | ||||||||
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0.515 | R4 R = Peer reviewed scientific publications Eisenia foetida4 = Verified data |
High | ||||||||
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General |
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High (class III) | - | - | ||||||||
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2000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Moderate | ||||||||
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13000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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3.34 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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Occupational exposure may occur through dermal contact | ||||||||||
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Health issues |
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USEPA - possible human carcinogen |
Handling issues |
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No information available | |||
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Health: H302, H317, H330 Environment: H400, H410 |
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Xn - Harmful: R22 N - Dangerous for the environment: R50/53 |
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S60, S61 | |||
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III (Slightly hazardous) | |||
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butachlor | ||
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butachlore | ||
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Butachlor | ||
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butachlor | ||
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butaclor | ||
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butaclor | ||
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butachlor | ||
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butachloor |
Record last updated: | 02/01/2021 |
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 |