Methazole (Ref: VCS-438) |
![]() Last updated: 04/01/2021 |
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(Also known as: metazol; mezopur; oxydiazol; bioxone; chlormethazole) |
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An obsolete herbicide once used for the post-emergence treatment for weed control in vegetables | |
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Grasses including Nutsedge; Broad-leaved weeds including morning glory | |
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Onions and leeks; Cotton; Potatoes; Tea; Vines; Turf grass | |
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Obsolete | |
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circa 1970 |
UK regulatory status |
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Not approved | ||
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Expired | ||
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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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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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C₉H₆Cl₂N₂O₃ | |
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CN1C(=O)N(OC1=O)C2=CC(=C(C=C2)Cl)Cl | |
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No data | |
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LRUUNMYPIBZBQH-UHFFFAOYSA-N | |
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InChI=1S/C9H6Cl2N2O3/c1-12-8(14)13(16-9(12)15)5-2-3-6(10)7(11)4-5/h2-4H,1H3 | |
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Yes |
General status |
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Herbicide | |
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Oxadiazolone | |
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Synthetic | |
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Selective, induces stunting and chlorosis | |
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20354-26-1 | |
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243-761-6 | |
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369 | |
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106001 | |
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4690 | |
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261.1 | |
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2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione | |
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2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione | |
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Not known | |
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Not known | |
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Not applicable | |
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Not applicable | |
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Solid |
Formulations |
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Usually supplied as a wettable powder |
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1.5 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low | ||||||||
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123 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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1.66 X 1003 | Calculated | - | |||||||
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3.22 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
High | ||||||||
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1.60 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
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1.33 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low volatility | ||||||||
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2.31 X 10-01 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Moderately volatile | ||||||||
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Degradation |
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14 | DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data |
Non-persistent | |||||||
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1.0 | R3 R = Peer reviewed scientific publications 3 = Unverified data of known source |
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Cotton leaves, undercover, n=1 | ||||||||||
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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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3060 | ||||||||||
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Best available data | ||||||||||
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Fate indices |
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0.59 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.02 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
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32 | Q2 Q = Miscellaneous internet resources Estimated2 = Unverified data of unknown source |
Low potential | |||||||
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Not available | - | |||||||||
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777 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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> 2838 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Colinus virginianus3 = Unverified data of known source |
Low | ||||||||
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> 2.5 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Oncorhynchus mykiss4 = Verified data |
Moderate | ||||||||
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> 1.3 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Daphnia magna4 = Verified data |
Moderate | ||||||||
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0.7 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Lemna gibba3 = Unverified data of known source |
Moderate | ||||||||
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0.3 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pseudokirchneriella subcapitata 5 day3 = Unverified data of known source |
Moderate | ||||||||
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362 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 3 = Unverified data of known source |
Low | ||||||||
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General |
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High (class III) | - | - | ||||||||
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777 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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Health issues |
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Moderately toxic |
Handling issues |
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No information available | |||
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Not classified: Obsolete | |||
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Xn - Harmful: R21/22 Xi - Irritant: R36/38 N - Dangerous for the environment: R51, R53 |
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S2, S36/37, S61 | |||
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O (Obsolete substance) | |||
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methazole | ||
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methazole | ||
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Methazol | ||
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methazol | ||
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metazolo | ||
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metazol | ||
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metazol | ||
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Record last updated: | 04/01/2021 |
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 |