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[Chemical Knowledge]：Properties and uses of halogenated phosphate esters

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The properties and uses
of halogenated phosphate esters in the field of chemical production raw materials
halogenated phosphate esters are an important class of organophosphorus compounds, which are widely used in pesticides, flame retardants, plastic plasticizers and other fields. In this paper, the properties and uses of halophosphates are described in detail.

1. the properties of halogenated phosphate ester

1. physical properties

halogenated phosphate ester is usually colorless or pale yellow transparent liquid, with high boiling point, melting point and density. They have good solubility and can be dissolved in a variety of organic solvents.

2. chemical properties
the phosphorus atom in
halophosphate has high reactivity and can react with a variety of compounds. Common reactions include hydrolysis reaction, alcoholysis reaction, aminolysis reaction, etc. In addition, the halogenated phosphate also has good thermal stability and oxidation resistance.

2. The use of halogenated phosphate

1. Pesticide

halogenated phosphate is an important class of pesticides, with broad-spectrum, high efficiency, low toxicity and other advantages. They can be used as pesticides, fungicides, herbicides, etc., and have significant effects on the control of various crop diseases and insect pests. For example, chlorophosphate is a commonly used insecticide that has a strong contact and stomach-toxic effect on insects.

2. Flame retardant

halogenated phosphate as flame retardant, widely used in plastics, rubber, textiles and other fields. They improve the flame retardant properties of the material by preventing the chain reaction during combustion. For example, tris-(2,3-dibromopropyl) phosphate (TBPP) is a commonly used flame retardant, which can effectively improve the flame retardant properties of polymers.

3. Plastic plasticizer

halogenated phosphate can be used as a plastic plasticizer to improve the processing performance and flexibility of plastics. They can reduce the glass transition temperature of plastics and increase the ductility and impact strength of plastics. For example, chlorinated paraffin is a commonly used plastic plasticizer, widely used in polyvinyl chloride (PVC) products.

In short, halogenated phosphate esters have a wide range of applications in the field of chemical production raw materials, and play an important role in improving product performance and quality. When using halogenated phosphate, it is necessary to select the appropriate variety and dosage according to the specific application scenario, and pay attention to safe operation and standardized use to avoid adverse effects on the environment and human health.

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