N-Methyl pyrrolidone
1. Chinese name: N- methylpyrrolidone
2. English name: N-Methyl pyrrolidone
3. Chinese alias: NMP; 1- methyl -2-pyrrolidone; N- methyl -2- pyrrolidone
5. Sub-formula: C5H9NO
6. Product description:
Colorless oily liquid with slight smell of amine. Soluble with water, alcohol, ether, ester, ketone, halogenated hydrocarbon, aromatic hydrocarbon and castor oil. Low volatility, excellent thermal stability and chemical stability, and can volatilize with water vapor. It is hygroscopic. Sensitive to light.
The median lethal dose (rats, orally) was 3.8mg/kg.
Density: 1.028
Melting point:-24 C.
Boiling point: 203℃, 81-82 °C/10 mmHg
Flash point: 91 °C
The refractive index n20/D:1.47
Toxicity protection
It has mild irritation to skin, but no absorption. Because of the low vapor pressure, the risk of one inhalation is very small. However, chronic effects can cause dysfunction of central nervous system, and cause diseases of respiratory organs, kidneys and vascular systems. Inhalation of this product vapor in mice for 2 hours at a concentration of 0.18~0.20mg/L can cause mild irritation to upper respiratory tract and eyes. The LD _ 50 was 5200 mg/kg in mice and 7900mg/kg in rats. The maximum allowable concentration in the workplace is 100mg/m3. On-site operators should wear masks, protective glasses and gloves.
Edit this section of packaging, storage and transportation.
The chemical property of this product is inactive, and it is non-corrosive to other metals such as carbon steel and aluminum except copper. It is packed in galvanized iron drums, 50kg or 100kg per barrel, and small packages are packed in glass bottles to avoid light. Store and transport according to general chemical regulations.
Edit this paragraph purpose
This product is an important chemical raw material, a polar solvent with strong selectivity and good stability. It has the advantages of low toxicity, high boiling point, strong solubility, non-flammability, biodegradability, recyclability, safe use and suitability for various formulations. N- methylpyrrolidone (NMP) is a polar aprotic solvent. Has the advantages of low toxicity, high boiling point and outstanding dissolving power. Strong selectivity and good stability. Widely used in aromatic hydrocarbon extraction, purification of acetylene, olefin and diene, solvent of polyvinylidene fluoride, electrode auxiliary material of lithium ion battery, desulfurization of synthetic gas, refining of lubricating oil, antifreezing agent of lubricating oil, solvent for polymerization of insoluble engineering plastics, agricultural herbicide, insulation material, manufacturing of integrated circuit, cleaning of precision instruments and circuit boards in semiconductor industry, recovery of PVC tail gas, cleaning agent, dye assistant, dispersant, etc. It is also used as a solvent for polymers and a medium for polymerization, such as engineering plastics and aramid fibers. In addition, it can be used in pesticide, medicine and detergent. Its main uses are as follows:
1. Acetylene concentration and extraction of butadiene, isoprene, aromatic hydrocarbon, etc.
2. Refining of lubricating oil
3. Polymerization solvent for insoluble engineering plastics (polyphenylene sulfide, polyimide) and aramid fiber.
4. Electronic insulating materials, lithium-ion batteries
5. High-grade coatings, inks and pigments
6. Pesticide auxiliaries
7. Cleaning agent: deoiling, degreasing, dewaxing, polishing, rust prevention, paint removal, etc.
8. Artificial kidney functional membrane solution and seawater desalination membrane solution
