| Synonyms | Crospovidone |
| Cross linked polyvidone |
| Insoluble polyvinylpyrrolidone |
| Definition | Polyvinylpolypyrrolidone is a poly-[1-(2-oxo-1-pyrrolidinyl)-ethylene], cross linked in a random fashion. It is produced by the polymerisation of N-vinyl-2-pyrrolidone in the presence of either caustic catalyst or N, N'-divinyl-imidazolidone. Due to its insolubility in all common solvents the molecular weight range is not amenable to analytical determination |
| Chemical name | Polyvinylpyrrolidone, poly-[1-(2-oxo-1-pyrrolidinyl)-ethylene] |
| Chemical formula | (C6H9NO)n |
| Assay | Content not less than 11 % and not more than 12,8 % nitrogen (N) on the anhydrous basis |
| Description | A white hygroscopic powder with a faint, non-objectionable odour |
| Identification | |
A.Solubility | Insoluble in water, ethanol and ether |
B.pH of a 1 % suspension in water | Between 5,0 and 8,0 |
| Purity | |
| Water | Not more than 6 % (Karl Fischer) |
| Sulphated ash | Not more than 0,4 % |
| Water-soluble matter | Not more than 1 % |
| Free-N-vinylpyrrolidone | Not more than 10 mg/kg |
| Free-N, N'-divinyl-imidazolidone | Not more than 2 mg/kg |
| Lead | Not more than 5 mg/kg |
