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

Gowan’s rice herbicide ‘Avanza’ obtains exceptional authorization in Spain

Benzobicyclon

Argentina SENASA considering to ban chlorpyrifos

Chlorpyrifos

Corteva Agriscience launches two products for rice sector in Brazil

Tricyclazole Tebuconazole Cyhalofop-butyl Penoxsulam

Three unpublished pesticides registered in Brazil

Isoxaflutole

Sumitomo Chemical launches growth regulator for apples in Brazil

1-methylcyclopropene

Ascenza launches Cuprital fungicide against Asian rust in Brazil

Copper oxychloride

FMC launches new fungicide Onsuva in Argentina

Difenoconazole fluindapyr

CITYMAX: Ready to serve Chinese Biostimulant market with 55 overseas markets experience

Biostimulants

Nissan Chemical acquires mancozeb fungicide product line from Corteva Agriscience

Mancozeb

Sumitomo Chemical launches insecticide Abaday for caterpillar control in Brazil

Lufenuron Thiodicarb

Related CompaniesMore