Common name: butachlor
IUPAC name: N-butoxymethyl-2-chloro-2', 6'-diethylacetanilide
Chemical Abstracts name: N-(butoxymethyl)-2-chloro-N-(2, 6-diethylphenyl)acetamide
CAS RN: [23184-66-9]

PHYSICAL CHEMISTRY
Composition: 92% pure. Mol. wt.: 311.9; M.f.: C17H26ClNO2 Form: Light yellow to purple liquid with a faint, sweet odour. M.p.: -2.8 °C to 1.7 °C. B.p.: 156 ºC/0.5 mmHg. V.p.: 2.4x10-1 mPa (25 °C). Henry: 3.74x10-3 Pa m3 mol-1 (calc.) S.g./density: 1.076 (25 ºC). Solubility: In water 20 mg/l (20 ºC). Soluble in most organic solvents, including diethyl ether, acetone, benzene, ethanol, ethyl acetate, and hexane. Stability: Decomposes at 165 ºC. Stable to u.v. light. Stable indefinitely 45 °C. F.p.: >135 °C (Tag closed cup). Other properties: Viscosity 37 cP (25 °C).

APPLICATIONS
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.
Uses: 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. Effective rates range from 1.0-4.5 kg a.i./ha. Activity is dependent on water availability such as rainfall following treatment, overhead irrigation or applications to standing water as in rice culture.
Phytotoxicity: Non-phytotoxic to rice, cotton, barley, wheat, peanuts, sugar beet, and some brassicas.
Formulation types: EC; GR.