Tralkoxydim

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Tralkoxydim

中文通用名

三甲苯草酮

IUPAC

(RS)-2-[(EZ)-1-(ethoxyimino)propyl]-3-hydroxy-5-mesitylcyclohex-2-en-1-one

CAS

2-[1-(ethoxyimino)propyl]-3-hydroxy-5-(2,4,6-trimethylphenyl)-2-cyclohexen-1-one

CAS No.

87820-88-0

Molecular Formula

C₂₀H₂₇NO₃

Molecular Structure

General Product Information

Category

Herbicides > Cyclohexene oxime herbicides

Activity

Herbicide

Physical & Safety Data

Physical Properties

Molecular weight:329.4; Physical form:Colourless, odourless solid. Density:1.16 (25 °C); Composition:Tech. material is 92-95% pure. Melting point:106 °C; ( tech., 99-104 °C); Vapour pressure:3.7 × 10-4 mPa (20 °C, extrapolated); Henry constant:2 × 10-5 Pa m3 mol-1 (purified water); Partition coefficient(n-octanol and water):logP = 2.1 (20 °C, purified water); pKa:4.3 (25 °C); Solubility:In water 6 ( pH 5), 6.7 ( pH 6.5), 9800 ( pH 9) (all in mg/l, 20 °C). In hexane 18, methanol 25, acetone 89, ethyl acetate 110, toluene 213, dichloromethane >500 (all in g/l, 24 °C).; Stability:Stable >12 w (15-25 °C), 4 w (50 °C). DT50 (25 °C) 6 d ( pH 5), 113 d ( pH 7); after 28 d, 87% unchanged ( pH 9).;

Toxicology

Oral:Acute oral LD₅₀ for male rats 1258, female rats 934, male mice 1231, female mice 1100, male rabbits >519 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >2000 mg/kg. Mild skin and eye irritant (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC₅₀(4 h) for rats >3.5 mg/l air. ADI:(Bayer) 0.08 mg/kg b.w.; ( JMPR ) 0.1 mg/kg b.w. [1988].

Environmental Profile

Ecotoxicology:
Algae: EC₅₀ (120 h) for green algae 7.6 mg/l.Bees: LD₅₀ (contact) >0.1 mg/bee; (oral) 0.054 mg/bee.Birds:Acute oral LD₅₀ for mallard ducks >3020, partridges 4430 mg/kg. Dietary LC₅₀ (5 d) for mallard ducks >7400, quail 6237 mg/kg diet.Daphnia: EC₅₀ (48 h) >175 mg/l.Fish:LC₅₀(96 h) for mirror carp >8.2, bluegill sunfish >6.1, rainbow trout >7.2 mg/l.Worms: LC₅₀ (14 d) 87 mg/kg.Other aquatic spp.:EC₅₀ (14 d) for Lemna gibba 1.0 mg/l.

Environmental fate:
Animals:Readily excreted from rats, as 4 different metabolites; no unchanged tralkoxydim is detected.Soil:Degrades rapidly in lab. soil studies; typical DT₅₀ 2-5 d (aerobic), 3 w (flooded soil). Primary metabolites are in turn extensively degraded; within 30 dat, up to 44% of applied radioactivity is liberated as CO

Transport Information

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