Chlorotoluron

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Chlorotoluron

中文通用名

绿麦隆

IUPAC

3-(3-chloro-p-tolyl)-1,1-dimethylurea

CAS

N′-(3-chloro-4-methylphenyl)-N,N-dimethylurea

CAS No.

15545-48-9

Molecular Formula

C₁₀H₁₃ClN₂O

Molecular Structure

General Product Information

Category

Herbicides > Urea herbicides

Activity

Herbicide

Premix

FW, WG, WP. Premix Parters: piperonyl butoxide pyrethrins; propham.

Physical & Safety Data

Physical Properties

Molecular weight:212.7; Physical form:White powder, colorless, odorless crystals. Density:1.40 g/cm3 (20 °C); Melting point:148.1 °C; Vapour pressure:0.005 mPa (25 °C); Henry constant:1.44×10-5 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 2.5 (25 °C); Solubility:In water 74 mg/l (25 °C). In acetone 54, dichloromethane 51, ethanol 48, toluene 3.0, hexane 0.06, n-octanol 24, ethyl acetate 21 (all in g/l, 25 °C).; Stability:Stable to heat and u.v. light. Slowly hydrolysed by strong acids and alkalis. DT50(calc.) >200 d (pH 5, 7, 9; 30 °C). Solubility: At 20° C in acetone 5% w/v; benzene 2.4% w/v; methylene chloride 4.3% w/v.

Toxicology

Oral:Acute oral LD₅₀ for rats >5000 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >2000 mg/kg; not irritant to skin and eyes of rabbits. Not a skin sensitiser (guinea pigs). Inhalation:LC₅₀ (4 h) for rats >5300 mg/m³. Phytotoxicity:Some varieties of wheat and barley may be injured. ADI:(JMPR) 0.03 mg/kg [1994].

Environmental Profile

Ecotoxicology: Algae:EC₅₀ (72 h) for Scenedesmus subspicatus 0.024 mg/l.Bees:LD₅₀ (48 h) (contact) >20 mg/bee; (ingestion) >1000 ppm.Birds:Dietary LC₅₀ (8 d) for mallard ducks >6800, Japanese quail >2150, pheasants >10 000 ppm.Daphnia:LC₅₀ (48 h) 67 mg/l.Fish:LC₅₀ (96 h) for rainbow trout 35 mg/l, bluegill sunfish 50 mg/l, crucian carp >100 mg/l, catfish 60 mg/l, guppy >49 mg/l.Worms:LC₅₀ for earthworms >1000 mg/kg. Environmental fate: Animals:In mammals, following oral administration, >90% is eliminated in the urine and faeces within 24 hours. Main metabolism is via N-demethylation and stepwise oxidation of the ring methyl group to hydroxymethyl and carboxymethyl derivatives.Soil:DT₅₀ in soil 30-40 d, in water >200 d.Plant:Metabolites found in winter wheat include 3-chloro-p-toluidine, 3-(3-chloro-4-methylphenyl)-1-methylurea, and 1-(3-chloro-4-methylphenyl)urea.
WATER SOLUBILITY: 70 ppm at 20°C.

Transport Information

Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)