PVP-K90 (Polyvinylpyrrolidone K90, Povidone K90, CAS 9003-39-8) is high-molecular-weight non-ionic water-soluble homopolymer of 1-vinyl-2-pyrrolidone. It features outstanding thickening, film-forming, adhesive, colloid-protecting and complexing properties. Compared with low-K-value PVP grades, K90 delivers extremely high aqueous viscosity. Available in Industrial Grade, Cosmetic Grade, USP / EP / BP Pharmacopoeia Grade. TNJ Chemical is a professional manufacturer and exporter since 2001. We guarantee high-quality products, competitive prices and thoughtful service. If you want to buy or have any other inquiries, please contact sales@tnjchem.com
Product Data
Product Name Polyvinylpyrrolidone K90 (PVP-K90), Povidone K90
CAS Number 9003-39-8
EINECS‑EC 1312995-182-4
Synonyms 1-Ethenyl-2-pyrrolidinone homopolymer; Povidone K‑90
Molecular Formula (C6H9NO)n
Molecular Weight Mw ≈1 000 000-1 500 000 Da
Chemical Family Non-ionic vinyl-pyrrolidone homopolymer
Available Grade Industrial Grade; Cosmetic Grade; USP-EP-BP Pharma Grade
Regulatory Status REACH registered; Non-CMR, Non-PFAS, Non-nano; complying with USP / EP monographs
Physical & Chemical Characteristics
Physical form White to off-white free-flowing hygroscopic powder
Odour Odourless
Glass Transition Temperature Tg 160-175 °C (moisture‑dependent)
Solubility in water Freely soluble, forms high-viscosity aqueous solution
Solubility Soluble in methanol, ethanol and many polar organic solvents; insoluble in acetone, ether, aliphatic hydrocarbons
K-value (1 % aqueous solution, Fikentscher) 88-96
pH (5 % aqueous solution,25 °C) 3.0‑7.0
Bulk density 330‑480 kg/m³
Processing hint Strongly hygroscopic. Absorbs atmospheric moisture quickly; seal tightly during handling. Chemically stable towards acids and salts. Avoid strong oxidizing agents.
Quality Requirements
| Test Parameter | Industrial Grade | Cosmetic Grade | USP/EP Pharma Grade | Test Method |
|---|---|---|---|---|
| K‑Value (1 % H₂O) | 85‑97 | 88‑96 | 88‑96 | Capillary viscometer |
| Nitrogen Content | 11.3‑12.9 % | 11.5‑12.8 % | 11.5‑12.8 % | Elemental analysis |
| Loss on Drying / Water | ≤5.0 % | ≤5.0 % | ≤5.0 % | Karl‑Fischer titration |
| Residue on Ignition / Sulphated Ash | ≤0.10 % | ≤0.10 % | ≤0.10 % | Gravimetric |
| Vinylpyrrolidone (NVP monomer) | ≤0.10 % | ≤10 ppm | ≤10 ppm | HPLC |
| 2‑Pyrrolidone | ≤3.0 % | ≤3.0 % | ≤3.0 % | HPLC |
| Hydrazine | ‑ | ≤1 ppm | ≤1 ppm | Colorimetry |
| Peroxides (as H₂O₂) | ≤500 ppm | ≤400 ppm | ≤400 ppm | Titration |
| Heavy Metals (as Pb) | ≤10 ppm | ≤10 ppm | ≤10 ppm | AAS |
Main Functions & Recommended Applications
Cosmetic & Personal‑Care: High‑performance film‑former and thickener for hair‑spray, mousse, styling gel; stabilizer for shampoo, hair‑dye, lipstick and sunscreen formulationsHefei TNJ ....
Pharmaceutical: Sustained‑release matrix material; tablet binder; suspension stabilizer; solubilizing auxiliary for topical and oral preparations (pharmacopoeia grade required).
Coating & Adhesive: Thickener, film‑forming and dispersing agent for water‑based coatings, ink and adhesive systems.
Textile & Detergent: Dye complexing agent, anti‑dye‑transfer auxiliary for laundry formulations.
Other fields: Ceramic additive, membrane‑forming polymer, biochemical research raw material.
Important note:
PVP‑K90 is highly hygroscopic; moisture uptake will reduce solution viscosity and affect formulation performance. Dissolve gradually under gentle stirring to avoid lump formation. End‑user shall validate suitability for own formulation and final application. Refer to SDS for full safety guidance.
Logistics & Storage Information
Packaging options: 25 kg fibre‑drum with inner PE liner; or as per request.Lead‑time: Samples: 7‑15 working days against deposit.
Shipment modes: sea freight, air freight, international courier.
Storage condition: Keep container tightly closed. Store in cool, dry, well‑ventilated warehouse, keep away from heat source, alkali and oxidizing agents.Shelf‑life: 24 months under original sealed storage.
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