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Chemical Identification
Common Name
Naled
中文通用名
二溴磷
IUPAC
1,2-dibromo-2,2-dichloroethyl dimethyl phosphate
CAS
1,2-dibromo-2,2-dichloroethyl dimethyl phosphate
CAS No.
300-76-5
Molecular Formula
C4H7Br2Cl2O4P
Molecular Structure
Category
Activity
Insecticide, acaricide
Premix
Emulsion concentrate, liquid, LVC.
Premix Parters: 1-naphthaleneacetic acid.
Physical Properties
Molecular weight:380.8; Physical form:Colourless liquid, with a slightly pungent odour; ( is yellow). Density:1.96 at 20℃; Composition:Tech. grade is c. 93% pure. Melting point:26-27.5℃; Vapour pressure:266 (20℃); Solubility:Practically insoluble in water. Readily soluble in aromatic and chlorinated solvents. Slightly soluble in aliphatic solvents and mineral oils.; Stability:Stable when dry, but rapidly hydrolysed in aqueous media (over 90% in 48 h at room temperature), and more rapidly in alkaline and acidic media. Degraded by sunlight.
Toxicology
Oral:Acute oral 50 for rats 430 /.Percutaneous:Acute percutaneous 50 for rabbits 1100 /kg. Irritating to skin; causes eye burns. Inhalation:No harm was suffered by mice exposed for 6 h to 1.5 /l air. Phytotoxicity:Injury may be caused to apples, pears, melons, cherries, plums, peaches, nectarines, beans, cotton, and some varieties of ornam
Environmental Profile
Ecotoxicology:
Bees:Toxic to bees.Fish:LD50 (24 h) for goldfish 2-4 /l; no mortality to mosquito fish when applied at 560 g/.Other aquatic spp.:EC50 for crabs 0.33 /l. No mortality to tadpoles when applied at 560 g/.
Environmental fate:
Plant:In plants, the bromine atoms are reductively cleaved, with formation of dichlorvos , which evaporates or undergoes rapid hydrolytic cleavage.
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

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