Norflurazon (Ref: H 52143) |
![]() Last updated: 27/11/2019 |
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(Also known as: norflurazone; H 9789; monometflurazon) |
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A pre-emergence herbicide used to control germinating weeds in various cropping, non-agricultural and industrial situations | |
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Grasses; Sedges; Broad-leaved weeds | |
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Fruit; Vegetables; Nuts; Cotton; Peanuts; Soybeans | |
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Current | |
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1968 |
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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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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C₁₂H₉ClF₃N₃O | |
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CNC1=C(C(=O)N(N=C1)C2=CC=CC(=C2)C(F)(F)F)Cl | |
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No data | |
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NVGOPFQZYCNLDU-UHFFFAOYSA-N | |
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InChI=1S/C12H9ClF3N3O/c1-17-9-6-18-19(11(20)10(9)13)8-4-2-3-7(5-8)12(14,15)16/h2-6,17H,1H3 | |
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Yes |
General status |
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Herbicide | |
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Pyridazinone | |
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- | |
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Synthetic | |
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Selective, absorbed by roots and translocated. Bleaching: inhibition of carotenoid biosynthesis. | |
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27314-13-2 | |
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248-397-1 | |
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8233 | |
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105801 | |
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33775 | |
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303.7 | |
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- | |
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4-chloro-5-methylamino-2-(α,α,α-trifluoro-m-tolyl)pyridazin-3(2H)-one | |
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4-chloro-5-(methylamino)-2-(3-(trifluoromethyl)phenyl)-3(2H)-pyridazinone | |
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Potential groundwater contaminant | |
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F1 | |
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12 | |
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Not applicable | |
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Not applicable | |
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White to greyish-brown crystalline powder |
Formulations |
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Available in a variety of formulations including wettable powders, flowable concentrates and granules |
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34 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low | ||||||||
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142000 | L3 L = Pesticide manuals and hard copy reference books / other sources Ethanol3 = Unverified data of known source |
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50000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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2500 | L3 L = Pesticide manuals and hard copy reference books / other sources Xylene3 = Unverified data of known source |
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177 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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2.82 X 1002 | Calculated | - | |||||||
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2.45 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | ||||||||
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1.45 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
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Not applicable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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No dissociation | |||||||||||
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3.86 X 10-03 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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3.50 X 10-05 | 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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90 | W4 W = French database provided by ARVALIS-Institut du Végétal 4 = Verified data |
Moderately persistent | |||||||
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225 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Persistent | ||||||||
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Literature field studies DT₅₀ range 3-9 months USA | ||||||||||
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12.4 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 9.0-15.9 days, 2 field crops, various matrices, n=2 | ||||||||||
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Soil adsorption and mobility |
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- | W3 W = French database provided by ARVALIS-Institut du Végétal 3 = Unverified data of known source |
Slightly mobile | |||||||
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700 | ||||||||||
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10.7 | R4 R = Peer reviewed scientific publications 4 = Verified data |
Moderately mobile | |||||||
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295 | ||||||||||
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1.303 | ||||||||||
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Literature data: Kf range 0.35-93.02 mL g⁻¹, Kfoc range 42-578 mL g⁻¹, 1/n range 0.87-1.64, Soils=17 | ||||||||||
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Fate indices |
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3.60 | Calculated | High leachability | ||||||||||||||||||||||||||
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7.68 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
Key metabolites |
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Soil | - | - |
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28 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Whole fish4 = Verified data |
Low potential | |||||||
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Not available | - | |||||||||
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> 5000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Low | ||||||||
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19 | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
High | |||||||
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> 2150 | L3 L = Pesticide manuals and hard copy reference books / other sources Anas platyrhynchos3 = Unverified data of known source |
Low | ||||||||
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> 8.1 | L3 L = Pesticide manuals and hard copy reference books / other sources Oncorhynchus mykiss3 = Unverified data of known source |
Moderate | ||||||||
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> 15 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
Moderate | ||||||||
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1.0 | P3 P = Other governments and regulators Daphnia magna3 = Unverified data of known source |
Moderate | ||||||||
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> 2.29 | 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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0.086 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Lemna gibba4 = Verified data |
Moderate | ||||||||
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> 0.0176 | L3 L = Pesticide manuals and hard copy reference books / other sources Raphidocelis subcapitata3 = Unverified data of known source |
Moderate | ||||||||
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> 0.38 | P4 P = Other governments and regulators Chlamydomonas reinhardtii4 = Verified data |
Moderate | ||||||||
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> 236 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Apis mellifera4 = Verified data |
Low | |||||||
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235 | L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source |
Low | ||||||||
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1000 | 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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> 5000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
Low | ||||||||
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5000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.02 | 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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Possible liver toxicant Harmful if swallowed USEPA - possible human carcinogen |
Handling issues |
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No information available | |||
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Environment: H400, H410 | |||
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Xn - Harmful: R22 Xi - Irritant: R36/38 |
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U (Unlikely to present an acute hazard) | |||
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norflurazon | ||
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norflurazon | ||
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Norflurazon | ||
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norflurazon | ||
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norflurazon | ||
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norflurazona | ||
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norflurazon | ||
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Record last updated: | 27/11/2019 |
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 |