1-Ethyl-2-pyrrolidone NEP N-Ethyl-2-pyrrolidone CAS 2687-91-4

Tree Chem 1-Ethyl-2-pyrrolidone (NEP) CAS 2687-91-4 is produced under strict manufacturing control to guarantee stability and batch-to-batch consistency. With its strong dissolving power and low moisture content, NEP is an excellent solvent for polyurethane, epoxy, PVDF resins, and various engineering polymers.

We manufacture and supply NEP for applications across lithium-ion batteries, semiconductor cleaning, photoresist processing, pharmaceutical synthesis, ink & coating, and adhesive systems, ensuring consistent drum supply and comprehensive technical documentation support. For cooperation or purchase inquiries, please contact info@cntreechem.com.

Especificación

Información básica

Especificación técnica

Aplicaciones

Lithium Battery Industry

• N-Ethyl-2-Pyrrolidone (NEP) is widely used as a polar solvent in the production of lithium-ion batteries, where it acts as an excellent replacement for N-Methyl-2-Pyrrolidone (NMP) in cathode and anode slurry formulations. Its high boiling point, strong polarity, and good solvency enable the dissolution of polyvinylidene fluoride (PVDF) binders and the uniform dispersion of active materials such as LiCoO₂ and LiFePO₄. In high-solid battery systems, NEP offers improved viscosity control and reduces volatile organic compound emissions, making it a preferred choice for eco-friendly battery production.

Industria electrónica y de semiconductores

• NEP is a critical cleaning and stripping agent in semiconductor and LCD manufacturing. It is used in photoresist removal, circuit cleaning, and residue elimination during etching and patterning processes. Because of its superior solvency and low corrosivity, NEP effectively removes organic debris without damaging metal layers or substrates. It also serves as a key component in high-purity formulations for wafer surface treatment and PCB cleaning, where its chemical stability is crucial to maintain device integrity.

Coatings and Inks

• NEP is used as a high-boiling solvent and coalescent in coatings, paints, and printing inks. It provides excellent resin solubility for polyurethanes, epoxies, and acrylics, enhancing film formation, adhesion, and gloss. In ink formulations, NEP acts as a flow modifier and dispersant to stabilize pigments and dyes. It is particularly effective in UV-curable and high-solids systems, where it helps achieve uniform color distribution and scratch resistance in final products.

Pharmaceutical and Agrochemical Industry

• In pharmaceutical applications, NEP functions as a reaction medium and extraction solvent for drug intermediates and bioactive compounds. It offers high chemical stability and excellent solubility for both hydrophilic and hydrophobic substances, allowing controlled reaction conditions and efficient yields. In the agrochemical sector, NEP is employed as a co-solvent and carrier in the formulation of herbicides, fungicides, and insecticides, improving the dispersion and penetration of active ingredients in liquid and solid formulations.

Polymer and Fine Chemical Industry

• NEP is a powerful solvent in the production of engineering plastics and specialty polymers such as polyimides, polyurethane elastomers, and polyarylene sulfides. It provides a stable reaction medium for polymerization and film-forming processes. In fine chemical manufacturing, NEP is used in the synthesis of heterocyclic and aromatic compounds where strong solvent polarity is required. Its thermal and chemical stability make it suitable for continuous processes at elevated temperatures and pressures.

Chemical Processing and Catalysis

• In chemical process engineering, NEP acts as a reaction medium and selective extractant for aromatics, acetylenes, and unsaturated hydrocarbons. It is applied in catalytic hydrogenation and oxidation reactions due to its excellent stability and compatibility with metal catalysts. Its use in the recovery and recycling of valuable organic components enhances process efficiency and reduces waste.

Other Applications

• NEP is employed as a component in lubricant formulations, plasticizers, and textile auxiliaries. It acts as a surface wetting agent in fiber treatment and a stabilizer in polymer emulsions. Its high flash point and low volatility allow safe operation under industrial conditions. Due to its excellent solubility and chemical compatibility, NEP continues to find new uses in emerging fields such as advanced coatings, composite materials, and battery electrolyte systems.

Almacenamiento y manipulación

• Store in a sealed container under cool, dry, and ventilated conditions.
• Avoid direct sunlight and high temperature exposure.
• Keep away from oxidizing agents, acids, and alkalis.
• Use only clean, dry equipment to prevent moisture contamination.
• Ensure adequate grounding and ventilation during transfer.

Aviso de uso

• Wear appropriate PPE (gloves, goggles, protective clothing).
• Avoid skin and eye contact and prolonged inhalation exposure.
• Maintain proper ventilation in the working area.
• Dispose of waste according to local environmental regulations.
• Battery slurry system: Active material 95 parts + PVDF 3 parts + conductive agent 2 parts + NEP solvent — forms stable, uniform dispersion for high-density electrodes.
• Semiconductor cleaning agent: NEP 60% + DMSO 25% + isopropanol 10% + inhibitors 5% — efficiently removes photoresist and flux residues without metal damage.
• Coating formulation: Epoxy resin 50 parts + pigment 10 parts + additives 5 parts + NEP as co-solvent — improves film formation and adhesion.
• UV ink mixture: Acrylic oligomer 60% + photoinitiators 7% + NEP 5% + diluent 28% — enhances flow and gloss.
• Pharmaceutical reaction medium: API precursor 1 mol + reagent 1.2 mol + NEP 30 mL — ensures efficient reaction and product purity.
• Agrochemical emulsifiable concentrate: Technical material 30% + surfactant 15% + NEP 50% + water 5% — improves active ingredient dispersion and penetration.
• Polyimide synthesis medium: Dianhydride 1 mol + diamine 1 mol + NEP 100 mL — provides stable reaction and uniform film formation.
• Catalytic reaction solvent: NEP with palladium catalyst system — enhances reaction efficiency and selectivity in aromatic hydrogenation.
• Plasticizer blend: NEP 10% + phthalate ester 60% + stabilizer 30% — improves flexibility and aging resistance of plastics.
• Lubricant formulation: Base oil 80% + NEP 10% + anti-oxidant 10% — enhances solvency and surface wetting in metal machining.

Embalaje

• 200 kg iron drum
• Custom packaging available upon request