Tebutam

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Tebutam

中文通用名

牧草胺

IUPAC

N-benzyl-N-isopropylpivalamide
or
N-benzyl-N-isopropyl-2,2-dimethylpropionamide

CAS

2,2-dimethyl-N-(1-methylethyl)-N-(phenylmethyl)propanamide

CAS No.

35256-85-0

Molecular Formula

C₁₅H₂₃NO

Molecular Structure

General Product Information

Category

Herbicides > Amide herbicides

Activity

Herbicide

Physical & Safety Data

Physical Properties

Molecular weight:233.4; Physical form:Light brown liquid. Density:0.975 (20 °C); Flash point:>80 °C (with 2% toluene); Vapour pressure:c. 89 mPa (25 °C); Henry constant:1.5 × 10-2 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3; Solubility:In water 0.79 g/l ( pH 7, 20 °C). Readily soluble in organic solvents, e.g. acetone, hexane, methanol, toluene, chloroform >500 g/l (25 °C).; Stability:Chemically stable under normal storage conditions. Thermally stable at temperatures below the boiling point. Stable to light. Stable to hydrolysis at pH 5, 7 and 9 (all at 25 °C).;

Toxicology

Oral:Acute oral LD₅₀ for albino rats 6210, guinea pigs 2025 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats and albino rabbits >2000 mg/kg; a slight irritant to the eyes and skin of rabbits. Inhalation:LC₅₀ for rats >2.18 mg/l air. There was no adverse effect when albino rats were exposed to an aerosol (66% vol. mixture of tech. product and acetone). Phytotoxicity:A large number of crops are susceptible, including cereals, maize, carrots, flax, onions,

Environmental Profile

Ecotoxicology:
Algae: LC₅₀ (96 h) for Scenedesmus 82 mg/l.Bees:Acute oral :Dietary LC₅₀ (8 d) for mallard ducks and bobwhite quail >5000 mg/kg. Fish: LC₅₀ (96 h) for rainbow trout 23, bluegill sunfish 19, moonfish 18.7 mg/l.

Environmental fate:
Animals:In rats, following oral administration, rapidly excreted in the urine and faeces.Soil:Bound by the organic matter of soil; DT₅₀ c. 2 mo.Plant:In plants, tebutam is rapidly metabolised.

Transport Information

Hazard Class:III(Slightly hazardous)