Benzalkonium Chloride is a cationic surfactant with a wide range of applications and multiple uses. The following are its main uses:

1. Fungicide: Benzalkonium Chloride is a broad-spectrum, high-efficiency fungicide, which can effectively control the propagation of bacteria and algae in water and the growth of slime, and has good slime stripping effect. It is widely used in food processing, medicine, textile, oil field, petrochemical, water treatment and public facilities for disinfection and sterilization.
2. Antistatic agent: Due to its chemical properties, benzalkonium chloride can be used as antistatic agent to reduce the generation of static electricity.
3. Leveling agent: In textile industry, benzalkonium chloride is used as leveling agent and retarding agent for acrylic fiber dyeing to improve dyeing fastness.
4. Stabilizer: In some industrial applications, benzalkonium chloride is used as a stabilizer to help maintain the stability of solutions or mixtures.
5. Disinfectant: Benzalkonium chloride solution is commonly used for pre-surgical skin disinfection, mucous membrane and wound disinfection.
6. Corrosion inhibitor for chemical equipment: In chemical equipment, benzalkonium chloride can be used as a corrosion inhibitor to reduce the corrosion of the equipment.
7. Bactericide for oilfield water injection: In the process of oilfield water injection, benzalkonium chloride is used as a bactericide to prevent the growth of bacteria.
8. Degreasing and deodorizing: Benzalkonium chloride has certain degreasing and deodorizing ability.
9. Medical use: Benzalkonium chloride is also used in the medical field, such as the sterilization and disinfection of surgical instruments.

It should be noted that benzalkonium chloride is corrosive and irritating, and appropriate protective measures should be taken during operation to avoid direct contact with skin and eyes.

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Benzalkonium chloride is a common cationic surfactant with a wide range of applications, including as a disinfectant and preservative. However, the search results did not directly provide information on the melting point of benzalkonium chloride. Usually, benzalkonium chloride exists as a mixture, and its purity and specific composition may affect its physical properties, including melting point. If accurate melting point data is required, it is recommended to refer to professional chemical databases or specific technical data sheets provided by manufacturers of benzalkonium chloride. In practical applications, due to the fact that benzalkonium chloride is usually used in aqueous solution, its melting point information may not be a frequently queried parameter.
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