2P (2-Pyrrolidone) is a widely-used solvent with outstanding characteristics. It is miscible with almost all other organic solvents and has a high boiling point.

  • CAS: No. 616-45-5 (T)
  • EINECS: No. 210-483-1
  • Japan, Chemical Substances Control Law: METI-No. 5-112
  • Japan, Industrial Safety and Health Law: No. 5-112
  • Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
  • Japan, Fire Services Law: Hazardous material Class 4 Petroleums No.3 (water-soluble liquid).




2P is a compound containing nitrogen in a 5-membered ring.  It has the following characteristics:

  • Miscible in almost all organic solvents (alcohols, ethers, esters, aromatic hydrocarbons, chlorinated hydrocarbons, carbon disulfide, etc.)
  • Mixes with water in all proportions.
  • High boiling point.
  • Chemically and thermally stable, non-corrosive.
Common Names 2-Pyrrolidone
Structure 2P
CAS No. 616-45-5
Japan, Chemical Substances Control Law METI-No. 5-112
Japan Poisonous and Deleterious Substances Control Law Not applicable
Japan, Fire Services Law Hazardous material Class 4 Petroleums No.3 water-soluble Hazardous Rank III
Molecular Weight 85.2
Appearance Clear liquid
Odor Weak amine smell
Specific Gravity (25/4℃) 1.1
Viscosity(mPa・s) 13.3(at 25℃)
Boiling Point (℃) 251
Freezing Point (℃) 25
Vapor specific gravity 2.9
Flash Point (℃) 129 (Cleveland open cup)
Autoignition Temperature (℃) 347



  • Pharmaceutical and Cosmetic Raw Materials
    • γ-Aminobutyric acid raw material
    • Polyvinyl pyrrolidone raw material
  • Extraction Agent
    • Extraction of aromatic compounds
  • Plasticizers for Polymer-Based Floor Polish
    • Acrylic
    • Acrylic-Styrene
  • De-colorant
    • Kerosene
    • Rosin
    • Fatty acids
  • Solvent
    • Synthetic resins
    • Agricultural chemicals (chlordane etc.)
    • Polyhydric alcohols (glycerin, sorbitol)
    • Other (printing inks etc.)
  • Starting Material for Organic Synthesis
    • n-Methylol compounds
    • γ-Amino acid derivatives
  • Polymer Raw Material
    • 4-Nylon

Storage and Handling

2P is classified under the Japanese Fire Services Act as a hazardous material, Class 4, Petroleums No.3 (4,000 liter quantity specified), water-soluble, Hazardous Rank III.
Since 2P is hygroscopic, if moisture content is to be controlled, it is important to keep storage containers tightly closed or under a dry nitrogen atmosphere.
When handling, protective equipment such as protective gloves and goggles should be worn. If contact with skin occurs, wash immediately with soap and water.
For more information, please refer to our company's Material Safety Data Sheet (SDS).



Product Specifications

Item Specification
Appearance Colorless liquid
Hue (APHA) <60
Purity (%) >98
Moisture (%) <0.5

Available Quantities

Drum 220kg
Oilcan 20kg

Inquiries Concerning Products

Mitsubishi Chemical Corporation
C4 Derivatives Unit

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