[Chemical Knowledge]：What is DMA Solvent?

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DMA is an organic solvent widely used in chemical reagents and industrial manufacturing. Its full name is N,N-dimethylethanolamine, which is usually represented by the English name DMA or DMMEA. DMA has a wide range of applications, including pigment coatings, pharmaceuticals, pesticides and plastics. This article will detail the chemical properties, physical properties, applications and safe use of DMA.

1. the chemical properties of DMA

DMA has a chemical formula of C4H11NO and a molecular weight of 89.14g/mol. Its appearance is colorless, transparent liquid, with a strong amine smell. The solubility of DMA in water is very good, and it can be mixed with water in any proportion at normal temperature and pressure. DMA is an alkaline substance, and weak acids can neutralize it. The pKa value of DMA is about 10.75-10.8, so under weak acidic conditions, it can be protonated to N,N-dimethyl ethanol ammonium, which has a higher solubility in the form of salts.

2. the physical properties of DMA

DMA has many unique physical properties that are different from traditional organic solvents. DMA has low viscosity, low volatility and good boiling point. This makes it an excellent reaction solvent, especially in the reaction under high temperature and high pressure conditions. In addition, the oxidation resistance and ultraviolet radiation resistance of DMA are also excellent.

3. DMA Application

1. Pigment coating: DMA can be used as a solvent for amide resins, used to dissolve and dilute dyes and pigments, and prepare high transparency coatings. DMA can also be used to mix and dilute chemicals such as paints, varnishes, and varnishes.

2. Medicine: DMA has good penetration and absorption, and is an intermediate for the preparation of some drugs. For example, the oral painkiller non-steroidal anti-inflammatory drug esmolol hydrochloride is made by the DMA reaction. In addition, DMA can also be used to prepare certain antibiotics, anti-tumor drugs, etc.

3. Insecticides: DMA can be used as a variety of pesticides intermediates, such as methamidophos. For some pests and diseases that cannot be cured by regular drugs, DMA also has a certain control effect.

4. Plastics: DMA can be used as a solvent or reaction intermediate in the synthesis of polymer compounds such as nylon and polyamide. DMA can also be used to produce polyurethane (PUR), a plastic widely used in construction, cars and home appliances.

Safe Use of 4. DMA

DMA is toxic and corrosive. The use of DMA should pay attention to the following safety matters:

1. should avoid contact with the skin. In case of accidental contact, leave the site immediately and rinse the affected area with plenty of water.

2. Should use gloves, masks and other protective equipment, and maintain good ventilation conditions.