2-Pyrrolidone

2-Pyrrolidone or 2-Pyrrolidinone or Butyrolactam or Aminobutyrolactam or 2-Ketopyrrolidine is an organic compound. It is a colorless liquid that is miscible with water and most common organic solvents. 2-Pyrrolidone itself and various derivatives made from it have a variety of industrial uses. 2-Pyrrolidone itself is used in inkjet cartridges.

General Properties and Specifications of 2-Pyrrolidone or 2-Pyrrolidinone or Butyrolactam or Aminobutyrolactam or 2-Ketopyrrolidine:
Appearance: Colorless to light yellow solid or liquid depending on temperature.
Assay: 99% minimum.
Water: 0.2% maximum.
Relative density: around 1.12
Melting point: 23C-25C literature.
Boiling point: 245C literature.
Flash point: 129C literature.
Solubility: Soluble in water, benzene, ethanol etc.

Pyrrolidone BP Ph Eur Grade Specification:
C4H7NO -- 85.1 - CAS 616-45-5

DEFINITION
Pyrrolidin-2-one.

CHARACTERS
Appearance: Clear, colourless or slightly greyish liquid, or white or almost white crystals, or colourless crystal needles.
Solubility: Miscible with water, with ethanol (96 per cent) and with most common organic solvents.
Melting point: About 25C; the molten substance remains liquid at temperatures below the melting point.
Boiling point: About 245C.

IDENTIFICATION
First identification: A
Second identification: B, C
A. Infrared absorption spectrophotometry - Comparison pyrrolidone CRS.
B. Relative density: 1.112 to 1.115.
C. Refractive index: 1.487 to 1.490.

TESTS
Use the molten substance for all tests.
Appearance: The substance to be examined is clear and not more intensely coloured than intensity 7 of the range of reference solutions of the most appropriate colour.
Alkalinity: To 100 mL of water add 1.0 mL of bromothymol blue solution and adjust to a green colour with 0.02 M potassium hydroxide or 0.02 M hydrochloric acid. To 50 mL of this solution add 20 mL of the substance to be examined and titrate with 0.02 M hydrochloric acid to the initial colour. Not more than 8.0 mL of 0.02 M hydrochloric acid is required.
Related substances: To pass the test by Gas chromatography.
Water: Maximum 0.1 per cent, determined on 1.00 g.
Sulfated ash: Maximum 0.1 per cent, determined on 1.0 g.

Certifications :
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