polyvinyl pyrrolidone （K90）
Brand : EASTCHEM
Origin : China
Delivery time : One week
Supply capacity : 5000MT per annum
Purity : ≥99.0
cas no. : 9003-39-8
Polyvinylpyrrolidone (PVP), also commonly called polyvidone or povidone, is a water-soluble polymer made from the monomer N-vinylpyrrolidone.
Stable. Incompatible with strong oxidizing agents. Light sensitive. Hygroscopic.
Store at RT.
NVP residual order (capacity method)%≤
NVP residual (liquid chromatography) ppm≤
PH value (5% aqueous solution)
nitrogen content %≤
Aldehyde (in the form of acetaldehyde) ppm≤
Heavy metals (by lead) ppm≤
Peroxide (measured by hydrogen peroxide) ppm≤
Polyvinylpyrrolidone, PVP is a non-ionic high molecular polymer. PVP is classified according to its average molecular weight. It is customarily used to indicate the K value. Different K values represent different PVP average molecular weight ranges. The K value is actually a characteristic value related to the relative viscosity of the PVP aqueous solution, and the viscosity is a physical value related to the molecular weight of the high molecular polymer. Therefore, the K value can be used to characterize the average molecular weight of PVP. Generally, the K value is more Large, the greater the viscosity.
Industrial applications of PVP include use as an adhesive to improve strength and thickness; increase strength in paper production; use as a resin coating; improve dye coloration in synthetic fibers; also commonly used in inks, imaging, lithography, detergents and soaps , textiles, pottery, electricity, metallurgy, and as a polymerization additive.
PVP is also widely used in the pharmaceutical industry due to its excellent adhesion, film formation, dispersion and thickening properties.