Trichlorfon is a highly effective and low toxic insecticide, which has strong stomach toxicity and contact killing effect, and has fumigation performance. It is most effective for Diptera, Lepidoptera and coleoptera pests. It is mainly used to control chewing mouth pests on vegetables, fruit trees, tea, mulberry, cotton and grain crops, as well as sanitary pests. Generally, it does not cause drug damage to a variety of crops, but it is easy to cause drug damage to sorghum and soybean. Purified trichlorfon is used as an anthelmintic for livestock. Industrial pure trichlorfon is recrystallized with methanol water to obtain refined trichlorfon, which can be used as anthelmintic and anti filariasis drugs for livestock.
CAS No.
52-68-6
Formula
C4H8Cl3O4P
Molecular Mass
257.43700
Exact Mass
255.92300
PSA
65.57000
Logp
2.16090
IUPAC
2,2,2-trichloro-1-dimethoxyphosphorylethanol
Attribute classification
Matter Classification
organic
Category
Chemical and Physical Properties
Melting Point
77-81 °C
Density
1.73
Boiling Point
100°C
Appearance
The pure product is white crystalline powder with slightly aromatic smell, and the industrial product has chloral smell. Soluble in benzene, ethanol, chloroform, methanol and other organic solvents, slightly soluble in carbon tetrachloride and insoluble in petroleum ether. At 25 ℃, the solubility in water is 154g / L. Stable at room temperature; Its aqueous solution becomes acidic after long-term storage. Under acidic conditions, it is free from demethylation and forms non-toxic demethyltrichlorfon; Under alkaline conditions, a molecule of hydrogen chloride is liberated from water to produce more toxic dichlorvos. It slightly corrodes the metal and begins to decompose at 180 ℃.
Manufacturing
