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Chemical Identification
Common Name
Aldicarb
中文通用名
涕灭威
IUPAC
(EZ)-2-methyl-2-(methylthio)propionaldehyde O-methylcarbamoyloxime
CAS
2-methyl-2-(methylthio)propanal O-[(methylamino)carbonyl]oxime
CAS No.
116-06-3
Molecular Formula
C7H14N2O2S
Molecular Structure
Physical Properties
Analytical: White, crystalline solid; Molecular weight: 190.3 g/mol;specific gravity 1.195 (25℃). Vapor pressure 2.9 x 10-5 mm Hg (25℃). Noncorrosive to common metals and plastics.
Toxicology
Analytical Grade Aldicarb (Rat): Oral LD50 1 mg/kg. (Rabbit): Dermal 20 mg/kg.Temik* 15G (Rabbit): Oral 5 mg/kg. Dermal >2000 mg/kg
Environmental Profile
HAZARDS: Fish: LC50 1.5 mg/l (98 h) (bluegill) SOIL PARTICLE ADSORPTION: Mobile in fine-to-coarse soils WATER SOLUBILITY: 0.6% at 25℃

Breakdown in soil and groundwater: Aldicarb is moderately persistent in soil. Moisture and pH have important impacts on the rate of breakdown. Aldicarb is very soluble and mobile in soil. Aldicarb movement is most serious for sandy or sandy loam soils. It has been found in wells in over 25 countries and in 12 states at concentrations above the drinking water Maximum Contaminant Level.

Breakdown in water: The half-life of aldicarb in water is from 1 day to a few months. In pond water, aldicarb is broken down rapidly and has a half-life of 5 to 10 days. It is degraded by bacteria, sunlight, and reactions with water. Because of its rapid degradation rate, levels in surface water may be lower than those in groundwater.

Breakdown in vegetation: In plants, aldicarb is rapidly converted to sulfoxide and more slowly to the sulfone compound. Citrus trees treated with 18 g per tree had the highest residue levels in the leaves. Residues of aldicarb also have been reported in sugar beets and grape leaves and fruit. In 1991, the manufacturer called for a halt to aldicarb use on bananas because of the elevated levels of residue found.
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

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