CAS accession number: 9003-39-8 Product specifications: Appearance: white powder chemical formula: (C6H9NO)n molecular weight: 111.143 density g/cm3: 1.69 melting point â??: 130 boiling point â??: 90-93 K value: 92.5 moisture %: 2.8 PH value (5% in water): 5.8 1-vinylpyrrolidin-2-one %: 0.0006 residue on ignition %:0.02 Nitrogen Content%: 12.2 aldehydes (as acetaldehyde)%: 0.00023 heavy metals (as Pb) ppm: