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Cocamidopropyl Betaine (CAPB): Indispensable Amphoteric Surfactant for Personal‑care Formulations
Aug 28,2026
This article introduces Cocamidopropyl Betaine (CAPB, CAS 61789-40-0), a coconut-derived amphoteric surfactant widely used in personal care and household cleaning. It covers key benefits including low irritation, rich foaming, thickening and anti-static conditioning, typical specifications of CAPB-35, main applications in shampoo, body wash, baby care and detergent, as well as packing and storage guidance.
Cocamidopropyl Betaine (CAPB)
CAS No.: 61789‑40‑0
Cocamidopropyl Betaine (CAPB) is a coconut‑oil‑derived amphoteric surfactant, widely used in cosmetic and detergent industry. Commercial grade normally contains 30‑35% active substance, appearing as pale‑yellow clear viscous liquid.
With both cationic and anionic groups in its molecular structure, CAPB has outstanding compatibility. It can be perfectly compounded with anionic, cationic and non‑ionic surfactants. Most commonly combined with SLES / AES, it effectively reduces formulation irritation while boosting foaming and thickening effects.
Key Benefits
- Mild & Low Irritation Mitigates skin and eye irritation caused by anionic surfactants. Suitable for baby‑care and sensitive‑skin products, preserves skin lipid barrier during cleansing.
- Superior Foaming & Foam Stabilizing Produces rich, dense and long‑lasting foam, stable even under hard‑water conditions, improves user experience of end products.
- Thickening & Anti‑static Conditioning Offers natural thickening effect. Applied in hair‑care formulas, it reduces static electricity and improves wet & dry combing performance.
- Broad Compatibility & Biodegradable Stable across wide pH range, hardly separates when mixed with other ingredients. Readily biodegradable, compliant with green‑trend requirements. Good tolerance to hard water and excellent wetting property.
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