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The products cover 5 types,
including monomer (NVP), homogeneous polymer (PVP-K), heterogeneous
polymer (PVP-VAc), polyvinylpolypyrrolidone and polymer complex
(PVP-I). To assure the quality of products, we set up the quality
assurance system focused on ISO9001 and was certified by the National
Quality Certification Organization in 2002. Moreover, DMF/COS for
Europe and FDA for United
States are also under certification.
By the effort of Nanhang, the quality of PVP-K, PVP-P and PVP-I have
met the requirement of Chinese pharmacopeia (CP2000), US
pharmacopeia (USP28) and European pharmacopeia (EP5.0).
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 NVP
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Colorless liquor, melting point is 11 . insoluble in
petroleum ether but soluble in water, alcohol, chlorofrom, benzene,
ethyl acetate and carbon disulfide.
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PVP-K Homopolymer Series
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PVP exists as powder or aqueous solution. It can
dissolve in water and variety of organic solvent .It is generally used
in cosmetics , surfactants , pharmaceutical industry and other related
industrial fields.
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PVP-A Copolymer Series
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Copolymer of different proportion of vinylpyrrlidone
to vinyl acetate can be offered in powder or alcohol solution product.
The aqueous product could be cloudy.
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PVP-P Polyvinylpyrrolidone Crosslinked
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PVP-P behaves as a white or creamy white powder with
faint characteristic odor, which is highly hydrophilic and capable of
complex with such substance as phenol, etc. It is completely insoluble
with relatively high crosslink density and does not form gels that can
impede disintegration, dissolution and drug release.
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PVP-I (PVP-IODINE)
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PVP-Iodine is a stable chemical complex of
polyvinylpyrrolidone (PVP) and elemental iodine, which is completely
soluble in water, ethanol etc. PVP-Iodine can extinguish bacterial,
virus, fungus effectively. It is a stable complex with no irritation,
which can dissolve in water completely. PVP-Iodine is the first
selected iodine containing microbicide in developed country.
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PQ-11
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Quaternized copolymer
of vinylpyrrolidone and dimethylaminoethyl methacrylate.PQ-11 is a high
molecular weight product (average molecular weight ~ 1,000,000),
supplied as a highly viscous, aqueous solution (20% solids).
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