Polyvinylpyrrolidone

Polyvinylpyrrolidone (PVP), characterized by the repeating unit (C6H9NO)n, is a water-soluble polymer synthesized from the monomer N-vinylpyrrolidone. This amorphous polymer is supplied as a white to off-white, hygroscopic powder or as an aqueous solution. Renowned for its exceptional solubility, low toxicity, and outstanding film-forming and adhesive properties, PVP has established itself as a critical excipient and additive across the pharmaceutical, cosmetic, beverage, and industrial sectors. Its versatility is further enhanced by the availability of various K-values (e.g., K-15, K-25, K-30, K-90), which correlate with molecular weight and viscosity, allowing for precise selection based on application needs.

Description

Product Description

1. Basic Information

Chemical Name: Polyvinylpyrrolidone
Common Acronym: PVP
Other Names: Povidone (Pharmacopeial name), Polyvidone
CAS Registry Number: 9003-39-8
Chemical Structure: A water-soluble synthetic polymer composed of repeating N-vinylpyrrolidone monomer units. It is typically characterized by its K-value (a viscosity-based index related to its average molecular weight, e.g., PVP K30).

2. Key Characteristics

Appearance: White to creamy-white hygroscopic powder or flakes.

Solubility: Freely soluble in water and various polar organic solvents (e.g., alcohols, chloroform).

Key Properties: Excellent film-forming, adhesive, suspending, and dispersing capabilities. It is physiologically inert, non-toxic, and exhibits strong complexation with many substances.

Stability: Chemically stable, though hygroscopic. Compatible with a wide range of other chemicals.

Test Items	Specification
Appearance	White to milky white powdery solid
Identification A.B.C.	Positive
K value	27-32
Moisture,%	≤5.0
Residue on ignition,%	≤0.1
PH of 5% aqueous solution	3.0-7.0
1-Vinylpyrrolidin-2-one,%	≤0.1
Nitrogen,%	11.5-12.8
Aldehyde,%	≤0.05
Heavy metal,ppm	≤10
Hydrazine,ppm	≤1.0
Peroxide,ppm	≤400

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