Phoxim

Organophosphorus insecticide
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Phoxim is a kind of Organophosphorus insecticide , chemical formula is C twelve H fifteen N two O three PS, To touch and kill Gastrotoxic effect Mainly, no internal absorption, right Lepidoptera Larvae are very effective. Phoxim Insecticidal spectrum It is wide and has strong knockdown force. It will decompose quickly due to unstable light in the field, so Residual period Short, low residual risk, but the residual period of the drug is very long when it is applied in the soil, which is suitable for prevention and control Underground pest
Chinese name
Phoxim
Foreign name
phoxim
Alias
O , O -Diethyl- O - α -Cyanophenylene amino thiophosphate Phoxim
chemical formula
C twelve H fifteen N two O three PS
molecular weight
two hundred and ninety-eight point two nine eight
CAS login number
14816-18-3
EINECS login number
238-887-3
Melting point
6.1 ℃
Boiling point
362.46 ℃
Water solubility
Insoluble
Density
1.176 g/cm³
Appearance
Light yellow oily liquid
Flash point
173 ℃
Security description
S36;S60;S61
Hazard symbol
Xn
Hazard description
R22;R50/53
UN dangerous goods number
two thousand eight hundred and ten

Physical and chemical properties

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Melting point: 6.1 ℃
Density: 1.176g/cm three
Boiling point: 362.5 ℃
Flash point: 173 ℃
Appearance: light yellow oily liquid
Solubility : insoluble in water, soluble in acetone aromatic hydrocarbon

Molecular structure data

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Molar volume (cm three /mol):245.6
Isotonic capacity (90.2K):633.3
surface tension (dyne/cm):44.1
Polarizability (10 -24 cm three ):31.02

Calculate chemical data

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Calculation of drainage parameters reference value (XlogP): None
Number of hydrogen bond donors: 0
Number of hydrogen bond receptors: 6
Rotatable Chemical bond Quantity: 7
Tautomer Quantity: 0
Heavy atom Quantity: 19
Complexity: 389
Isotope atom Quantity: 0
Determine the number of atomic structure centers: 0
Number of uncertain atomic structure centers: 0
Determine the number of chemical bond stereocenters: 1
Number of uncertain chemical bond structure centers: 0
covalent bond Number of units: 1

toxicology data

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acute toxicity :LD fifty : 2170mg/kg (male Rat Oral); 1000mg/kg (rat percutaneous); 250mg/kg (dogs by mouth); 250~500mg/kg (female cats and dogs by mouth); 250~375 (female rabbits by mouth).
Phoxim is low toxic to humans and animals. It has contact killing and Fumigation Toxicity.

Environmental hazards

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Aquatic organism Tolerance limit: carp Fish and trout 0.1~1.0 ppm 1~10ppm for goldfish.
aquatic Crustacea Animals are more sensitive, 0.01ppm, which can cause water Cladocera death
Hazard characteristics: in case of open fire High fever Flammable. It is subject to high thermal decomposition and emits highly toxic smoke.
Combustion (decomposition) products: carbon monoxide carbon dioxide nitrogen oxide Hydrogen cyanide Sulfur oxide Phosphorus oxide.

Scope of application

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Suitable for underground prevention pest More harmful to peanuts, wheat, rice, cotton, corn, fruit trees, vegetables, mulberry, tea and other crops Seed scale Pterous larva It has good effect and certain killing effect on eggs. It is also suitable for preventing warehouse and Sanitary pest

usage method

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1、 Stem and leaf Spray: 50% per mu Emulsifiable concentrates 1000-2000 times, spray 50L water to prevent wheat aphid Wheat sawfly Cotton aphid Pieris rapae Thrips Armyworm , fruit trees aphid Apple Small Leaf curler Pear star caterpillar , grape spot Leafhopper Inchworm Whitefly Helicoverpa assulta Etc. Dilute 50 ml 50% emulsifiable concentrates per mu with 1000 times spray, which can prevent Rice bract insect Rice leaf roller , leafhopper Planthopper Rice thrips , cotton lacewing, red lacewing Geotiger , Little grey cicada Pine caterpillar Etc.
2、 Seed dressing : 50% emulsifiable concentrate 100-165mL, mixed with 5-7.5kg water and 50kg wheat seeds can prevent and control underground pests, and seed dressing can be used for corn sorghum , millet, peanut and other crop seeds.
3. Prevention and control of underground pests: 100g of 50% emulsifiable concentrate, 5kg of water and 50kg of mixed wheat seeds can be used for prevention and control of underground pests.
4. Pouring and heart filling: use 1000 times of 50% emulsifiable concentrate to irrigate and control the ground tiger, 15 minutes later Immediate Poisoned grass larvae crawl out of the ground.
5. Prevention Stored grain pest : Prepare phoxim into 1.25-2.5mg/kg liquid medicine, mix it with grain evenly and stack it to prevent Rice elephant , Proposed Valley Robber And other stored grain pests.
6. Prevention and control of health pests: spray with 500 to 1000 times 50% emulsifiable concentrates livestock The stables are effective in preventing and controlling health pests and are safe for livestock.

matters needing attention

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1. Cannot be compared with Alkaline substance Mixed use.
2. Cucumber kidney bean It is sensitive to phoxim and easy to cause harm.
3. Phoxim is easy to decompose when exposed to light, so it is best to use it in the field at night or in the evening.
4、 sorghum It is sensitive to phoxim and should not be sprayed. Corn field can only be used Granule prevention and cure Corn borer Do not spray aphid Armyworm Etc.
5. Poisoning symptoms, first aid measures and others Organophosphorus Same.