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PVP-K Homopolymer Series
USP/EP Name: Povidone(PVP)
Chemical Name: Homopolymer of Vinylpyrrolidone
CTFA Nomenclature: Polyvinylpyrrolidone (Abbreviated to PVP)
CAS NO.：9003-39-8
Molecular Formula: (C6H9NO)n
Physical properties:
White or milky powder, and colorless or slight yellow transparent liquid. It can dissolve in water and variety of organic solvents, such as grain alcohol, isopropyl alcohol or chloroform, but not in acetone or diethyl ether. Have a good absorption moisture, film-forming, complex ability and physiological compatibility and so on.
Specification
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PVP/Povidone
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K15
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K17
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K25
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K30
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K90
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K Value
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13-17
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15-19
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22-28
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27-33
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81-98
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Grade
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Tech
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USP/EP
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Cosmetic
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Moisture %
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≤5.0
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≤5.0
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≤5.0
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PH（5% in water）
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3-7
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3-7
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3-7
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Vinylpyrrolidone %
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≤ 0.2
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≤ 0.1
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≤ 0.1
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Sulfate Ash%
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≤ 0.1
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≤ 0.1
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≤ 0.02
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Nitrogen %
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--
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11.5-12.8
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--
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Heavy Metals(as Pb) ppm
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--
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< 10
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< 10
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Acetaldehyde ppm
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--
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≤ 500
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--
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Hydrazine ppm
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--
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≤ 1.0
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--
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Peroxide（asH2O2）ppm
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--
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≤400
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--
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1. Pharmaceutical Grade
Application: used as binder for tablet and pellet, dissolving assistant for injection, flowing assistant for capsule, dispersant for liquid medicine and pigment, stabilizer for enzyme and heat sensitive drug, coprecipitant for poorly soluble drug, lubricator and antitoxical assistant for eye drug, PVP has been used as excipients more than one hundred drugs.
2. Technical Grade
Application: as surface coating agent, dispersing agent, thickener, binder in paint, printing ink, textile, printing and dyeing, color picture tubes. Can improve the binder for metal, glass, plastic and other materials, bonding properties.
3. Cosmetic Grade
Appllication: used extensively in a wide range in hair care, skin care & oral care products. The products are particularly suitable for formulations where viscosity modification and film forming properties are required. This series are particularly well suited to hair styling products, especially clear formularions.
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