1-ethyl-2-pyrrolidone

CAS Number
2687-91-4
EC Number
220-250-6
Chemical Formula
C6H11NO
Molecular Weight
113.16 g/mol
Abbreviation
NEP

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.

Other Names (Synonyms)

Ethyl pyrrolidone (nep)|n-ethyl pyrrolidone|1-ethylpyrrolidin-2-one|n-ethyl-2-pyrrolidone|NEP|E0358

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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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℃

Documentation

Safety & Handling Learn More

Danger
GHS08· Health Hazard GHS05· Corrosive GHS07· Irritant

Hazard Statements

H227 Combustible liquid
H302 Harmful if swallowed
H315 Causes skin irritation
H318 Causes serious eye damage

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.

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
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