Butralin

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Butralin

中文通用名

仲丁灵

IUPAC

(RS)-N-sec-butyl-4-tert-butyl-2,6-dinitroaniline

CAS

4-(1,1-dimethylethyl)-N-(1-methylpropyl)-2,6-dinitrobenzenamine

CAS No.

33629-47-9

Molecular Formula

C₁₄H₂₁N₃O₄

Molecular Structure

General Product Information

Category

Herbicides > Dinitroaniline herbicides

Activity

Herbicide, plant growth regulator

Premix

Oxadiazon+Butralin
Mesotrione+Butralin
Butralin+Diuron
Bensulfuron-methyl+Butralin
Emulsifiable concentrate. Premix Parters: MSMA sodium cacodylate; sodium cacodylate;

Physical & Safety Data

Physical Properties

Molecular weight:295.3; Physical form:Yellow-orange crystals with a slightly aromatic odour. Density:1.063 (25 °C); Composition:Tech. is ×98%. Melting point:61 °C; ( tech., 59 °C); Vapour pressure:0.77 mPa (25 °C); Henry constant:7.58 × 10-1 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.93; Solubility:In water 0.3 mg/l (25 °C). In methanol 97.5, hexane 300 (both in g/l, 25 °C).; Stability:Decomposes at 265 °C. Hydrolytically and photochemically stable. Concentrates are stable on storage under dry conditions >3 y, but should not be stored <-5 °C or allowed to freeze.;

Toxicology

Oral:Acute oral LD₅₀ for male rats 1170, female rats 1049 mg/kg( tech.). Percutaneous:Acute percutaneous LD₅₀ ( tech.) for rabbits ×2000 mg/kg. Slightly irritating to skin, moderately irritating to eyes (rabbits). Moderate skin sensitiser (Kligman & Magnusson test); not Inhalation: LC₅₀ for rats >9.35 mg/l air.

Environmental Profile

Ecotoxicology:
Algae: EC₅₀ (5 d) for Selenastrum capricornutum 0.12 mg/l.Bees:Slightly toxic to bees.Birds:Acute oral LD₅₀ for bobwhite quail >>2250, Japanese quail >>5000 mg/kg. Dietary LC₅₀ (8 d) for bobwhite quail and mallard ducks >10 000 mg/kg diet.Daphnia: EC₅₀ (48 h) 0.12 mg/l.Fish:LC₅₀ (96 h) for bluegill sunfish 1.0, rainbow trout 0.37 mg/l.Other beneficial spp.:Not toxic to soil microflora at usual application rate. Application at 2-10 ×recommended rate did not significantly alter microbial population.

Environmental fate:
Animals:Extensively metabolised and excreted in urine and faeces. Metabolised in the rat by the primary metabolic processes of N-dealkylation, oxidation and nitro reduction, and by secondary processes of N-acetyl and glucuronic acid conjugation.Soil:In soil, microbial degradation occurs, with formation of the corresponding aniline, ring splitting and evolution of CO₂ (P. C. Kearney et al., J. Agric. Food Chem., 1974, 22, 856). Persists in soil forPlant:In plants, metabolism leads to evolution of CO₂.

Transport Information

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