Fluometuron

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Fluometuron

中文通用名

氟草隆

IUPAC

1,1-dimethyl-3-(α,α,α-trifluoro-m-tolyl)urea

CAS

N,N-dimethyl-N′-[3-(trifluoromethyl)phenyl]urea

CAS No.

2164-17-2

Molecular Formula

C₁₀H₁₁F₃N₂O

Molecular Structure

General Product Information

Category

Herbicides > Urea herbicides

Activity

Herbicide

Premix

Liquid, dry flowable, wettable powder.
Premix Parters: karbutilate;

Physical & Safety Data

Physical Properties

Molecular weight:232.2; Physical form:White crystals. Density:1.39 at 20 °C; Melting point:163-164.5 °C; Vapour pressure:0.125 mPa (25 °C); 0.33 mPa (30 °C) ( OECD 104); Partition coefficient(n-octanol and water):logP = 2.38; Solubility:In water 110 mg/l (20 °C). In methanol 110, acetone 105, dichloromethane 23, n-octanol 22, hexane 0.17 (all in g/l, 20 °C).; Stability:Stable in acidic, neutral, and alkaline media at 20 °C. Decomposed by u.v. irradiation.

Toxicology

Oral:Acute oral LD₅₀ for rats >6000 mg/ kg. Percutaneous:Acute percutaneous LD₅₀ for rats >2000, rabbits >10 000 mg/kg. Mild skin and eye irritant (rabbits). Not a skin sensitiser. Phytotoxicity:Phytotoxic to sugar beet, beetroot, soya beans, french beans, brassicas, tomatoes, legumes, cucurbits, aubergines, and several other crops.

Environmental Profile

Ecotoxicology:
Algae: EC₅₀ (3 d) 0.16 mg/l.Bees: LD₅₀ (oral) >155 μg/bee; (topical) >190 μg/bee. Birds: LD₅₀ for mallard ducks 2974 mg/kg. Dietary LC₅₀ (8 d) for Japanese quail 4620, mallard ducks 4500, ring-necked pheasants 3150 mg/ kg diet.Daphnia: LC₅₀ (48 h) 10 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 30, bluegill sunfish 48, catfish 55, crucian carp 170 mg/l.Worms: LC₅₀ (14 d) for earthworms >1000 mg/ kg soil.

Environmental fate:
Animals:In rats, mainly formation of demethylated metabolites and some conjugation with gluconuronic acid. Elimination, mainly in the urine, was 96% within one week.Soil:In soil, microbial degradation is significant and rapid, with continual liberation of CO₂. Photodecomposition and volatilisation are insignificant. It is moderately leachable in all but very sandy soils: K_oc 31-117 Plant:In plants, degraded by a three-step process, first demethylation to a monomethyl, then to a demethylated intermediate, and finally deamination-decarboxylation to an aniline derivative.

Transport Information

Signal Word:WARNING; Hazard Class:II(Moderately hazardous)