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NMP N-methylpyrrolidone Polar solvent

Product introduction
NMP is a highly efficient and selective solvent, with low toxicity, non-corrosiveness, high solubility, low viscosity, low volatility, good stability, and easy recovery.

Typical parameters

Chroma	≤20（APHA）
density	1.027-1.030（25/4℃）
content	≥99.9%
moisture	≤0.05%
Distillation range	≥95%（198-208℃）
pH value	7-9
Isomers	≤100ppm
Refractive index	1.465-1.470
toxicity	LD50=7210mg/kg

NMP is easy to store and transport due to its low vapor pressure and high flash point (95°C). However, it has strong hygroscopicity, and the NMP solution that dissolves pesticides has strong permeability to the skin, so care should be taken when using it.

The main purpose

【1】Used as an efficient solvent for polymerization
NMP has greater solubility to resin, and its solubility parameters are shown in the following table:

Resin name	Solubility %	Resin name	Solubility%
Acrylonitrile/PVC	>10	Polyamide	>10
Polyurethane rubber	10	Polymethylmethacrylate	>10
PVC	>10	PVP	>10
polycarbonate	10	Ethyl cellulose	25
Polyester film	>10	Polyacrylonitrile	24

Note: Solubility is the weight (g) of the resin dissolved in 100g of solvent.
The solubility parameter of NMP for most resins is about 11. Since the solubility is very similar, the compatibility is very good.

[2] Recovery of acetylene
【3】Aromatic extraction
[4] Recovery of butadiene and isoprene
[5] Refinement of lubricating oil
【6】Gas purification and tail gas recovery
【7】Used in medicine
【8】Detergents for industrial use Clean chemical equipment, blockages, attachments and coatings, clean precision instruments, etc. It can also be used to produce battery chemicals.