Description
Polyvinylpyrrolidone K 25 is an extra pure polymeric excipient and process aid with the repeating unit formula (C₆H₉NO)ₙ and CAS number 9003-39-8. The K 25 grade is characterised by a molar mass of approximately 24 000 g/mol and a density of 1,2 g/cm³, supporting reproducible behaviour in solution and solid formulations. Extra pure quality helps reduce background interference in analytical and formulation work. Typical uses include viscosity modification, film formation studies, and compatibility screening with active or functional ingredients. Clear CAS identification and defined K-value class simplify specification against protocols and purchasing standards. The compact pack size is practical for method development and small-batch preparation while retaining the physical data needed for process calculations.
This article is part of Polymers, PEGs & silicones, in Organic chemicals & synthesis reagents.
Key features
- Appearance: white to off-white powder
- K-value: 22.5-27.0
- Nitrogen content (N): 11.5-12.8 %
- Clearness (5 % in H2O): clear
- Water (KF): ≤5.0 %
- Sulphated ash: ≤0.1 %
- pH value (5 % in H2O): 3.0-5.0
- Vinylpyrrolidone (HPLC): ≤0.001 %
- Heavy metals: ≤0.001 %
- Aldehyde: ≤0.05 %
- CAS number: 9003-39-8
- Pack sizes: 100 g, 500 g, 1 kg, 2.5 kg, 5 kg
- Empirical formula: (C₆H₉NO)ₙ
- Molar mass: ~24 000 g/mol
- Density: 1,2 g/cm³
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Polyvinylpyrrolidon K 25, extra pure, 100 g, plastic
What is this article?
Polyvinylpyrrolidon K 25, extra pure, 100 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Polymers, PEGs & silicones, inside Organic chemicals & synthesis reagents, in Lab chemicals.
A polymer, a PEG or a silicone is sold by molecular weight, or by viscosity, as much as by name. PEG 400 and PEG 4000 are different liquids and solids. A silicone oil's viscosity grades are the product range. The average molecular weight is the specification.
An organic chemical is built on carbon. In this category it is a building block or a reagent for making another molecule: a starting material, a coupling agent, a polymer, a PEG. Purity is a specification of which impurities remain. The structure, the CAS number and the grade decide whether two bottles are the same substance. Structures and properties are on PubChem. Nomenclature is IUPAC. Classification follows ECHA and the CLP Regulation.
Which category should I open next?
The category is Organic chemicals & synthesis reagents. The sub-category is Polymers, PEGs & silicones. The catalogue is Lab chemicals.
Shelves beside this one are Organic building blocks & synthesis reagents and Click chemistry, bioconjugation & synthesis reagents.
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