Penconazole

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Penconazole

中文通用名

戊菌唑

IUPAC

(RS)-1-[2-(2,4-dichlorophenyl)pentyl]-1H-1,2,4-triazole

CAS

1-[2-(2,4-dichlorophenyl)pentyl]-1H-1,2,4-triazole

CAS No.

66246-88-6

Molecular Formula

C₁₃H₁₅Cl₂N₃

Molecular Structure

General Product Information

Category

Fungicides > Triazole fungicides

Activity

Fungicide

Premix

Thiophanate-methyl+Penconazole
Emulsifiable concentrate, wettable powder.
Premix Parters: atrazine; imazamox; imazaquin; imazaquin imazethapyr; imazethapyr; oxyfluorfen; picolinafen; propanil; trifluralin;

Physical & Safety Data

Physical Properties

Molecular weight:284.2; Physical form:Fine white powder. Density:1.30 (20 °C); Melting point:57.6-60.3 °C; Vapour pressure:0.17 mPa (20 °C); 0.37 mPa (25 °C); Henry constant:6.6 ×10-4 Pa m3 mol-1 (20 °C, calc.).; Partition coefficient(n-octanol and water):logP = 3.72 ( pH 5.7, 25 °C).; pKa:1.51, v. weak base; Solubility:In water 73 g/m3 (20 °C). In ethanol 730, acetone 770, toluene 610, n-hexane 22, n-octanol 400 (all in g/l, 25 °C).; Stability:Stable to hydrolysis ( pH 1-13), and to temperatures up to 350 °C.

Toxicology

Oral:Acute oral LD₅₀ for rats 2125, mice 2444 mg/ kg. Percutaneous:Acute percutaneous LD₅₀ for rats >3000 mg/kg. Not a skin irritant; irritating to eyes (rabbits). Not a skin sensitiser (guinea pigs). Inhalation:LC₅₀ (4 h) >4000 mg/m³.

Environmental Profile

Ecotoxicology:
Algae: IC₅₀ (5 d) for Scenedesmus subspicatus 3.0 mg/l; EC₅₀ (5 d) for Selenastrum capricornutum 0.83 mg/l.Bees:Non-toxic to bees; LD₅₀ (oral and topical) >5µg/bee.Birds:Acute oral LD₅₀ (8 d) for Japanese quail 2424, Pekin ducks >3000, mallard ducks >1590 mg/kg. LC₅₀ (8 d) for bobwhite quail and mallard ducks >5620 ppm.Daphnia: IC₅₀ (48 h) 7-11 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 1.7-4.3, carp 3.8-4.6, bluegill sunfish 2.1-2.8 mg/l.Worms: LC₅₀ (14 d) for earthworms >1000 mg/ kg.

Environmental fate:
Animals:After oral administration, penconazole is rapidly eliminated practically to entirety with urine and faeces. Residues in tissues were not significant and there was no evidence for accumulation.Soil: DT₅₀ in soil is 133-343 d, depending on soil type. DT₅₀ for photolysis is 4 d (natural sunlight).Plant:Metabolic pathways are hydroxylation of the propyl side-chain, conjugation to glucosides or metabolism to triazolylalanine and triazolylacetic acid. WATER SOLUBILITY: 70 ppm at 20°C

Transport Information

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