2-Chloro-5-fluorobenzaldehyde（CAS# 84194-30-9)

It is an organic compound with the chemical formula C7H4ClFO. The following is its nature, use, preparation and safety information:Nature:
-Appearance: White crystal or light yellow solid.
-Melting point: about 40-42 ℃.
-Boiling point: about 163-165 ℃.
-Density: about 1.435g/cm³.
-Solubility: It is soluble in some common organic solvents, such as ethanol, chloroform and dichloromethane.

Use:
It is mainly used for chemical reactions in organic synthesis. It can be used as an intermediate of fluorescent dyes, as a raw material in the pharmaceutical field, and in the agricultural field for the preparation of pesticides.

Preparation Method:
can be prepared by chlorination, fluorinated benzaldehyde method. The specific preparation method is as follows:
1. Under appropriate conditions, hydrofluoric acid is added to benzaldehyde to allow it to undergo a fluorination reaction.
2. After the reaction, hydrogen chloride is added to chlorinate the fluorinated product.
3. carry out the appropriate purification steps to obtain pure phosphonium.

Safety Information:
-is harmful substances, may cause irritation and damage to the human body. Wear protective gloves, glasses and respiratory protective equipment when necessary.
-Avoid inhaling its dust or gas, and avoid contact with skin and eyes.
-During storage and use, chemical safety procedures should be observed, and proper ventilation conditions should be maintained.
-For accidental exposure or ingestion, seek medical attention immediately and provide appropriate safety data.