PVP K90

PVP K90 is a high–molecular-weight polymer widely used in cosmetics, pharmaceuticals, and industrial formulations for its film-forming, binding, and thickening properties.

• INCI name: PVP (Polyvinylpyrrolidone)
• Molecular weight: ~1,000,000–1,500,000 Da (very high)
• Appearance: White or off-white powder or flakes
• Solubility: Freely soluble in water and many alcohols
• Viscosity: High (K-value of 90 = forms very viscous solutions)

🌿 Functions in Cosmetics & Personal Care

1. Film Former: Creates a smooth, flexible film on the skin or hair surface — helps hold hair styles or deliver actives.

2. Hair Fixative: Used in hair sprays, gels, and mousses for strong hold and humidity resistance.

3. Thickener & Stabilizer: Increases the viscosity of aqueous formulations and stabilizes emulsions and suspensions.

4. Binder: Used in pressed powders and solid formulations to hold ingredients together.

5. Solubilizer: Improves solubility of poorly soluble ingredients in aqueous systems.

💇 Common Applications

• Hair styling gels and sprays
• Hair conditioners
• Skin creams and serums
• Face masks (film-forming peel off face masks)
• Makeup (mascara, foundations)
• Pharmaceutical tablets (as binder and film former)

⚙ Formulation Notes

• Use level: Typically 0.1–5% in cosmetics; up to 10% in gels or sprays.
• Dissolves easily in water — stir slowly to avoid clumping.
• Compatible with: Most surfactants, alcohols, and glycols.
• Incompatible with: Strong acids, strong oxidizing agents, and some salts (may precipitate).
• pH stability: Best between 3–7.

Safety & Stability

• Non-toxic and non-irritating at cosmetic levels.
• Biocompatible — widely used in pharmaceutical and medical applications.
• Stable under normal storage; hygroscopic (absorbs moisture), so keep sealed.