‌N-methylpyrrolidone (NMP) is an important organic solvent with a wide range of applications, playing an important role in multiple fields. The following are the main uses of N-methylpyrrolidone:

‌Electronic field‌:
NMP is one of the important solvents for manufacturing electronic devices such as semiconductors, integrated circuits, and liquid crystal displays.
It can dissolve electronically active materials such as metals, oxides, and polymers for electroplating, etching, and cleaning processes.
In the microelectronics industry, NMP is used in high-end fields such as liquid crystals, semiconductors, and circuit boards.

‌Medical field‌:
NMP is used in the pharmaceutical industry for the preparation of synthetic drugs and drug intermediates, such as some antiviral drugs and anti-tumor drugs.
Pharmaceutical grade NMP has high safety requirements and is mainly used in medicine, pharmaceuticals, veterinary drugs, and pharmaceutical intermediates.

‌Chemical and other industrial fields‌:
NMP can be used as a solvent for polymerization reactions and is used to synthesize polymer materials such as engineering plastics such as polyamides, polyimides, and polyphenylene sulfide.
It is also used as a diluent and solvent for products such as paints, inks, and adhesives.
In petrochemical industry, NMP is used for acetylene concentration, synthesis gas desulfurization, lubricating oil refining, etc. As a pesticide adjuvant, it improves the solubility and dispersibility of pesticides. NMP is also used in insulating materials, pigments, industrial cleaning agents, etc. Lithium battery industry: NMP is a front-end solvent for lithium batteries and a supporting solvent for lithium battery positive electrode binders. Research and analysis fields: NMP is also used as a mobile phase or electrolyte in experiments such as liquid chromatography and electrophoresis. In summary, N-methylpyrrolidone has a wide range of applications in electronics, medicine, chemicals, lithium batteries, research and analysis, etc. due to its unique physical and chemical properties.

N-Methyl-2-pyrrolidone Chemical Properties

Melting point -24 °C (lit.)
Boiling point 202 °C (lit.) 81-82 °C/10 mmHg (lit.)
density 1.028 g/mL at 25 °C (lit.)
vapor density 3.4 (vs air)
vapor pressure 0.29 mm Hg ( 20 °C)
refractive index n20/D 1.479
Fp 187 °F
storage temp. Store at +5°C to +30°C.
solubility ethanol: miscible0.1ML/mL, clear, colorless (10%, v/v)
form Liquid
pka -0.41±0.20(Predicted)
color ≤20(APHA)
PH 8.5-10.0 (100g/l, H2O, 20℃)
Odor Slight amine odor
PH Range 7.7 – 8.0
explosive limit 1.3-9.5%(V)
Water Solubility >=10 g/100 mL at 20 ºC
Sensitive Hygroscopic
λmax 283nm(MeOH)(lit.)
Merck 14,6117
BRN 106420
Dielectric constant 32.200000000000003

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