Carbaryl

Carbaryl

甲萘威

1-naphthyl methylcarbamate

1-naphthalenyl methylcarbamate

63-25-2

C₁₂H₁₁NO₂

Insecticides > Carbamate insecticides

Insecticide, plant growth regulator

Carbaryl+metaldehyde
Carbaryl+fenvalerate
Aqueous dispersion, bait, dust, emulsifiable concentrate, flowables, granules, soluble concentrate, suspension concentrate, wettable powder, water dispersible granule. Premix Parters: chlorothalonil; cyfluthrin triadimenol; cymoxanil mancozeb; cymoxanil oxadixyl thiram; cyproconazole; diethofencarb; difenoconazole; epoxiconazole; fenbuconazole prochloraz; fenpropimorph mancozeb; fluquinconazole; hexaconazole; imazalil; iprodione; isoprothiolane; mancozeb; metalaxyl; prochloraz; propiconazole; sulfur; tebuconazole; tetraconazole; thiram; triadimenol; vinclozolin;

Molecular weight:201.2; Physical form:Colourless to light tan crystals. Density:1.232 (20 °C); Composition:Tech. grade is 99% pure. Melting point:142 °C; Flash point:193 °C; Vapour pressure:4.1×10-2 mPa (23.5 °C); Henry constant:7.39×10-5 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 1.85; Solubility:In water 120 mg/l (20 °C). Readily soluble in polar organic solvents. In dimethylformamide, dimethyl sulfoxide 400-450, acetone 200-300, cyclohexanone 200-250, isopropanol 100, xylene 100 (all in g/kg, 25 °C).; Stability:Stable under neutral and weakly acidic conditions. Hydrolysed in alkaline media to 1-naphthol; DT50 c. 12 d (pH 7), 3.2 h (pH 9). Stable to light and heat. Soluble in most polar organic solvents such as acetone and mixed cresols; hydrolyzes rapidly in alkaline solutions. Non-corrosive to metals, packaging materials, and application equipment.

Oral:Acute oral LD₅₀ for rats 264, female rats 500, rabbits 710 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >4000, rabbits >2000 mg/kg. Slight eye irritant, mild skin irritant (rabbits). Inhalation:LC₅₀(4 h) for rats 3.28 mg/l air. Phytotoxicity:Non-phytotoxic if used as directed. Under certain conditions, some varieties of apple and pear may be injured. ADI:(JMPR) 0.1 mg/kgb.w.[1995].

Ecotoxicology: Algae:EC₅₀ (5 d) for Selenastrum capricornutum 1.1 mg/l.Bees:Highly toxic to bees; LD₅₀ (topical) 1 mg/bee.Birds:Acute oral LD₅₀ for young mallard ducks >2179, young pheasants >2000, Japanese quail 2230, pigeons 1000-3000 mg/kg.Daphnia:LC₅₀ (48 h) 0.006 mg/l.Fish:LC₅₀ (96 h) for rainbow trout 1.3, sheepshead minnow 2.2, bluegill sunfish 10 mg/l.Worms:LC₅₀(28 d ) 106-176 mg/kg soil.Other aquatic spp.:LC₅₀(96 h) for mysid shrimp (Mysidopsis bahia) 0.0057 mg/l; LC₅₀ (48 h) for Eastern oyster (Crassostrea virginica) 2.7 mg/l.Other beneficial spp.:Toxic to beneficial insects. Environmental fate: Animals:In mammals, carbaryl does not accumulate in body tissues, but is rapidly metabolised to non-toxic substances, particularly 1-naphthol. This, together with the glucuronic acid conjugate, is eliminated predominantly in the urine and faeces. Metabolism of caSoil:Under aerobic conditions, carbaryl at 1 ppm degraded with DT₅₀ 7-14 d in a sandy loam and 14-28 d in a clay loam.Plant:Metabolites are 4-hydroxycarbaryl, 5-hydroxycarbaryl and methylol-carbaryl. WATER SOLUBILITY: 120 mg/l at 20°C

Signal Word:CAUTION; Hazard Class:II (Moderately hazardous)