2-Pyrrolidinone Cas 616-45-5

CAS Number

616-45-5

Molecular Formula

C4H7NO

Also known as:

2-Pyrrolidone; 2-Pyrrolidinone; Pyrrolidin-2-one; γ-Butyrolactam; Aminobutyrolactam; Butyrolactam.

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Product Description

Product introduction

2-Pyrrolidinone (IUPAC: pyrrolidin-2-one; also written 2-pyrrolidone or γ-butyrolactam; CAS 616-45-5) is a five-membered lactam supplied commercially as a clear, colourless to pale-yellow liquid or low-melting crystalline material. It is used industrially as a polar aprotic solvent, formulation co-solvent and as a monomer/intermediate for the manufacture of vinyl pyrrolidone monomers and specialty polymers. Technical and reagent grades are offered with lot Certificate of Analysis (CoA) and SDS; select the grade appropriate to formulation or synthesis control requirements.

Applications & Descriptions

  • Polar Solvent For Formulations
    Used as a polar aprotic co-solvent and viscosity modifier in water-borne inks, coatings and specialty cleaning formulations to improve solvency and film formation.

  • Monomer / Intermediate For Vinyl Pyrrolidone
    Serves as the feedstock for vinylation to produce N-vinyl-2-pyrrolidone (NVP), a key monomer for polyvinylpyrrolidone (PVP) and related copolymers used in industrial formulations.

  • Polymer Intermediate & Additive Precursor
    Employed in the synthesis of specialty polymers, oligomers and polymer additives where the pyrrolidone motif imparts polarity and adhesive properties.

  • Coating & Ink Additive
    Used to enhance wetting, adhesion and pigment dispersion in certain aqueous and solvent-borne ink and coating systems.

  • Analytical & Laboratory Reagent
    Supplied as a reagent for method development, reference standards and small-scale research where a stable polar lactam is required.

  • Chemical Process Solvent
    Utilised as a reaction medium for selective transformations in fine-chemical and specialty-chemical syntheses (evaluate solvent stability and downstream removal strategy).

Technical Parameters

Parameter Value
Melting point 23-25 °C
Boiling point 245 °C
Density 1.12 g/mL at 25 °C
Vapor density 2.9 (vs air)
Vapor pressure 0.04 hPa (20 °C)
Fp >230 °F
Storage temp 2-8°C
solubility H2O: miscible
Pka 16.62±0.20

Applications

Film-forming Agents/Resins

Quick Information

EINECS 210-483-1
Molecular Weight 85.1 g/mol

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