nav Searchuser
Chemical Identification
Common Name
Difenzoquat metilsulfate
中文通用名
野燕枯
IUPAC
1,2-dimethyl-3,5-diphenylpyrazolium methyl sulfate
CAS
1,2-dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate
CAS No.
43222-48-6
Molecular Formula
C18H20N2O4S
Molecular Structure
Category
Activity
Herbicide, fungicide
CropUse

Post-emergence control of wild oats in barley, wheat, rye, maize, ryegrass, and flax; applied at 750-1100 g/ ha when used alone. Also used as a fungicide to control powdery mildew in cereals.

Physical Properties
Molecular weight:360.4. Physical form:Colourless, hygroscopic crystals. Density:0.8 (25 °C). Composition:Tech. grade is 96% pure. Melting point:150-160 °C ( tech.); Flash point:>82 °C (Tag open cup); Vapour pressure:<1×10-2 mPa; Partition coefficient(n-octanol and water):logP = 0.648 ( pH 5), -0.62 ( pH 7), -0.32 ( pH 9); pKa:c. 7; Solubility:In water 765 g/l (25 °C). In dichloromethane 360, chloroform 500, methanol 588, 1,2-dichloroethane 71, isopropanol 23, acetone 9.8, xylene, heptane <0.01 (all in g/l, 25 °C). Slightly soluble in petroleum ether, benzene, and dioxane. Stability:Stable to light in aqueous media. Thermally stable. Stable in weakly acidic media, but decomposed by strong acids and oxidants.
Toxicology

Oral:Acute oral LD50 for male rats 617, female rats 373, male mice 31, female mice 44 mg/kg. Percutaneous:Acute percutaneous LD50 for male rabbits 3540 mg/kg. Moderate skin and severe eye irritant (rabbits). Inhalation: LC50 (4 h) 0.50 mg/l. ADI:0.01 mg/kg b.w.

Environmental Profile
Ecotoxicology: 
Bees:Contact LD50 36 µg/bee.Birds:Dietary LC50 (8 d) for bobwhite quail >4640, mallard ducks >10.388 mg/kg diet.Daphnia: LC50 (48 h) 2.63 mg/l.Fish: LD50 (96 h) for bluegill sunfish 696, rainbow trout 694 mg/l. 
Environmental fate: 
Animals:In rats, following oral administration, difenzoquat metilsulfate is excreted unchanged in the urine and faeces.Soil:Strongly adsorbed by soil; Kd c. 400, Koc c. 30 000. No significant microbial degradation occurs. Half-life in soil is c. 3 months.Plant:No significant metabolism of difenzoquat metilsulfate occurs in plants, removal being by photolytic demethylation to the monomethyl pyrazole.
Transport Information
Hazard Class:II (Moderately hazardous).

Porduct NewsMore

Flumioxazin – malignant weed destroyer with huge room for development

Flumioxazin

STK REGEV® ‘Hybrid’ Fungicide Registered in Chile

Difenoconazole Extract of Melaleuca Alternifolia

Yutian Analysis: Difenoconazole | 3,000-ton project is set to be built, but why is it so popular?

Difenoconazole

Albaugh develops new tebuthiuron based herbicide - Interview with José Santos (Director of Marketing and Product Development at Albaugh Brasil)

Tebuthiuron

Yutian Analysis: Glufosinate | Stand high in popular favor

Glufosinate-ammonium

Yutian Analysis: Sulfentrazone | Tagros fire broke placed Sulfentrazone on the spotlight

Sulfentrazone

Nufarm’s Cheetah herbicide label amendment expands use to several crops

Glufosinate-ammonium

Yutian Analysis: Diafenthiuron | 13 new countries thrust in

Diafenthiuron

US EPA reapproves glyphosate, claims pesticide poses no human health threat

Glyphosate

US EPA issues proposed interim decision on neonicotinoids, opens comments

Clothianidin Thiamethoxam Imidacloprid

Related CompaniesMore