Butachlor

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Butachlor

中文通用名

丁草胺

IUPAC

N-butoxymethyl-2-chloro-2′,6′-diethylacetanilide

CAS

N-(butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide

CAS No.

23184-66-9

Molecular Formula

C₁₇H₂₆ClNO₂

Molecular Structure

General Product Information

Category

Herbicides > Amide herbicides

Activity

Biochemistry Inhibits cell division by blocking protein synthesis. Mode of action Selective systemic herbicide, absorbed primarily by the germinating shoots, and secondarily by the roots, with translocation throughout the plant, giving higher concentrations in vegetative parts than in reproductive parts.

CropUse

Used pre-emergence for the control of annual grasses and certain broad-leaved weeds in rice, both seeded and transplanted. It shows selectivity in barley, cotton, peanuts, sugar beet, wheat and several brassica crops.

Weed Spectrum

Used pre-emergence for the control of annual grasses and certain broad-leaved weeds in rice, both seeded and transplanted.

Formulation

GR = Granule

Premix

Pyrazosulfuron-ethyl+Clomazone+Butachlor
Pyrazosulfuron-ethyl+butachlor
Propanil+Butachlor
Oxyfluorfen+Butachlor
Butachlor+Prometryn
Butachlor+Penoxsulam
Butachlor+Oxyfluorfen+Oxadiazon
Butachlor+oxadiazon
Butachlor+Mesotrione+Atrazine
Butachlor+Atrazine
Bensulfuron-methyl+glyphosate+butachlor
Bensulfuron-methyl+butachlor+prometryn
Bensulfuron-methyl+butachlor+isoproturon
Bensulfuron-methyl+butachlor+acetochlor
Bensulfuron-methyl+butachlor
glyphosate; triasulfuron;

Physical & Safety Data

Physical Properties

Molecular weight:311.9; Physical form:Light yellow to purple liquid with a faint, sweet odour. Density:1.076 (25 °C); Composition:×93.5% pure. Melting point:-2.8 °C to 1.7 °C; Flash point:>135 °C (Tag closed cup); Vapour pressure:2.4 × 10-1 mPa (25 °C); Henry constant:3.74 × 10-3 Pa m3 mol-1 ( calc.); Solubility:In water 20 mg/l (20 °C). Soluble in most organic solvents, including diethyl ether, acetone, benzene, ethanol, ethyl acetate, and hexane.; Stability:Decomposes at ×165 °C. Stable to u.v. light. Stable indefinitely × 45 °C.;

Toxicology

Oral:Acute oral LD₅₀ for rats 2000, mice 4747, rabbits >5010 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rabbits >13 000 mg/kg. Moderate skin irritant; practically non-irritating to eyes (rabbits). Contact sensitisation reactions observed in guinea pigs. Inhalation:LC₅₀ (4 h) for rats >3.34 mg/l air. Phytotoxicity:Non-phytotoxic to rice, cotton, barley, wheat, peanuts, sugar beet, and some brassicas. ADI:( JMPR) 0.01 mg/kg [1999].

Environmental Profile

Ecotoxicology:
Bees:LD₅₀ (contact) >100 mg/bee.Birds:Acute oral LD₅₀ for mallard ducks >4640 mg/kg. Dietary LC₅₀ (5 d) for mallard ducks >10 000, bobwhite quail 6597 mg/kg diet.Daphnia: LC₅₀ (48 h) 2.4 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 0.52, bluegill sunfish 0.44, carp 0.32, channel catfish 0.10-0.14, fathead minnow 0.31 mg/l.Other aquatic spp.:LC₅₀ (96 h) for crayfish 26 mg/l.

Environmental fate:
Animals:Metabolised to water-soluble metabolites and excreted.Soil:In soil, degradation is principally by microbial activity (Y.-L. Chen and T.-C. Wu, Nippon Noyaku Gakkaishi, 1978, 3, 411). Persists for c. 6-10 weeks. Converted in soil or water to water-soluble derivatives, with a slowPlant:Rapidly metabolised in plants to water-soluble metabolites, leading eventually to mineralisation.

Transport Information

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