Chinomethionat

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Chinomethionat

中文通用名

灭螨猛

IUPAC

6-methyl-1,3-dithiolo[4,5-b]quinoxalin-2-one
or
S,S-(6-methylquinoxaline-2,3-diyl) dithiocarbonate

CAS

6-methyl-1,3-dithiolo[4,5-b]quinoxalin-2-one

CAS No.

2439-01-2

Molecular Formula

C₁₀H₆N₂OS₂

Molecular Structure

General Product Information

Category

Acaricides / Miticides > Quinoxaline acaricides
Fungicides > Quinoxaline fungicides

Activity

Fungicide, acaricide

Premix

Dustable powder, suspension concentrate, wettable powder. Premix Parters: pyrazophos; sulfur;

Physical & Safety Data

Physical Properties

Molecular weight:234.3; Physical form:Yellow crystals. Density:1.556 (20 °C); Melting point:170 °C; Vapour pressure:0.026 mPa(20 °C); Henry constant:6.09×10-3 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 3.78 (20 °C); Solubility:In water 1 mg/l (20 °C). In toluene 25, dichloromethane 40, hexane 1.8, isopropanol 0.9, cyclohexanone 18, dimethylformamide 10, petroleum oils 4 (all in g/l, 20 °C). Soluble in hot benzene and dioxane.; Stability:Relatively stable under normal conditions. Hydrolysed in alkaline media; DT50 (22 °C) 10 d (pH 4), 80 h (pH 7), 225 min(pH 9). Moderately soluble in organic solvents.

Toxicology

Oral:Acute oral LD₅₀ for male rats 2541, female rats 1095 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >5000 mg/kg. Slightly irritating to skin; severely irritating to eyes (rabbits). Inhalation:LC₅₀ (4 h) for male rats >4.7, female rats 2.2 mg/l (dust). Phytotoxicity:Phytotoxic to certain varieties of apple, pear, currant, rose, and ornamentals.

Environmental Profile

Ecotoxicology: Algae:E_rC₅₀ (96 h) for Scenedesmus 0.14 mg/l.Bees:Not toxic to bees; LD₅₀>100 mg/bee.Birds:Acute oral LD₅₀ for bobwhite quail 196 mg/kg. Dietary LC₅₀ (5 d) for bobwhite quail 2409, mallard ducks >5000 mg/kg diet.Daphnia:LC₅₀ (48 h) 0.12 mg/l.Fish:LC₅₀ (96 h) for bluegill sunfish 0.0334, rainbow trout 0.131, golden orfe 0.24 mg/l.Worms:LC₅₀ (14 d) >1000 mg/kg. Environmental fate: Animals:In rats, following oral administration, chinomethionat is rapidly metabolised, and c. 90% is eliminated within 3 days in the faeces and urine. The main metabolite is chinomethionat acid (dimethylmercaptoquinoxaline-6-carboxylic acid), which also Soil:K_oc 45-90 (3 soil types from sandy loam to high organic matter). DT₅₀ in standard soil land 2 1-3 d.Plant:After application to fruit, no penetration of the a.i. or metabolites in the fruit pulp was observed. The only metabolite detected was dihydromethylquinoxalinedithiol. WATER SOLUBILITY: 1 mg/l at 20° C

Transport Information

Hazard Class:III (Slightly hazardous)