1-ethyl-2-pyrrolidone
Description
1-Ethyl-2-pyrrolidone (CAS 2687-91-4), commonly known as NEP, is a high-purity pyrrolidone solvent used across polymer processing and personal care formulation. It functions as a selective solvent and humectant, valued for its solvating strength and skin-compatible profile.
In plastics and polymer manufacturing, NEP dissolves engineering resins and specialty polymers where stronger solvents would degrade substrate integrity. Personal care formulators incorporate it into leave-on and rinse-off products.
These applications include hair treatments and skin serums where it acts as a humectant and carrier that enhances active ingredient penetration. Its UV-stabilizing function supports its use in coating formulations designed for outdoor applications.
NEP also serves as a reaction solvent in specialty chemical synthesis where low volatility and thermal stability are procurement priorities. It is supplied as a clear liquid in drum and IBC quantities for industrial use.
Bulk tanker options are available for larger industrial volumes to ensure consistent supply chains. Standard commercial grades include high-purity technical and cosmetic-grade specifications for various manufacturing needs.
Purity levels are typically at 99% or above to meet rigorous industrial requirements. Buyers sourcing for personal care applications should confirm compliance with relevant regional cosmetic ingredient regulations before formulation.
Physical Properties
| Melting Point | 86-88 °C |
| Boiling Point | 222 °C |
| Density | 0.992 g/mL at 25 °C(lit.) |
| Flash Point | 169 °F |
| Appearance | clear liquid |
| Color | Clear |
| Form | Liquid |
| Water Solubility | 1000g/L at 23℃ |
| Vapor Pressure | 18Pa at 20℃ |
| Refractive Index | n 20/D 1.465(lit.) |
| pH | 8-9 (100g/l, H2O, 20℃) |
| Log P | -0.2 at 20℃ |
Safety & Handling (Learn More)
Trade & Regulatory
| HS Code | 29337900 |
| UN Number | 1993 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 1 |
Documentation
Other Names
Ethyl pyrrolidone (nep)|n-ethyl pyrrolidone|1-ethylpyrrolidin-2-one|n-ethyl-2-pyrrolidone|NEP|E0358
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