Amphoteric Surfactants: Betaines and Hydroxysultaines
What is Amphoteric Surfactants: Betaines and Hydroxysultaines?
Amphoteric surfactants carry both positive and negative functional groups and exhibit charge that depends on solution pH. At formulation pH typical of personal care (5.0–6.5), betaines and amphoacetates exist as zwitterions compatible with anionic primaries such as SLES and LAS. Venus Ethoxyethers supports…
What is Amphoteric Surfactants: Betaines and Hydroxysultaines used for?
Amphoteric co-surfactants reduce irritation from anionic primaries, increase foam density and creaminess, improve viscosity when salt-adjusted, and tolerate electrolytes better than simple anionic–cationic pairs. Cocamidopropyl betaine (CAPB) is the industry-standard co-surfactant in mainstream shampoos and body… Venus Ethoxyethers manufactures and supplies in India; request a quote for your requirements.
Amphoteric surfactants carry both positive and negative functional groups and exhibit charge that depends on solution pH. At formulation pH typical of personal care (5.0–6.5), betaines and amphoacetates exist as zwitterions compatible with anionic primaries such as SLES and LAS. Venus Ethoxyethers supports formulators with amphoteric-compatible surfactant systems for mild cleansing, foam boosting, and electrolyte-tolerant cleaners.
Why formulators use amphoterics
Amphoteric co-surfactants reduce irritation from anionic primaries, increase foam density and creaminess, improve viscosity when salt-adjusted, and tolerate electrolytes better than simple anionic–cationic pairs. Cocamidopropyl betaine (CAPB) is the industry-standard co-surfactant in mainstream shampoos and body washes worldwide.
Common amphoteric types
- Betaines — cocamidopropyl betaine, lauryl betaine; foam boost and mildness in shampoos (2–6% active)
- Amphoacetates — sodium cocoamphoacetate, disodium cocoamphodiacetate; extra-mild baby and sensitive-skin cleansers
- Hydroxysultaines — cocamidopropyl hydroxysultaine; high-salt dish and institutional cleaners (2–5% active)
- Amine oxides — foam stabilizers in alkaline hard-surface and dish formulations
Cocamidopropyl hydroxysultaine
Hydroxysultaines (sultaines) tolerate high electrolyte loads better than standard betaines. Cocamidopropyl hydroxysultaine pairs with LAS or SLES in dish liquids and I&I cleaners at 2–5% active in 4–8% salt systems. Read the amphoteric surfactants guide for formulation examples and electrolyte tolerance comparison.
Typical blend systems
- SLES + CAPB shampoo — 10–12% SLES + 3–5% betaine + salt viscosity build
- SLES + cocamide MEA + CAPB — enhanced foam stability and viscosity
- Pearlizing shampoo blend — glycol distearate + laureth-3/9 with SLES and CAPB
- Sulfate-free syndet — CAPB + glucoside + sodium methyl cocoyl taurate
- Mild SLES + CAPB + lauryl glucoside — sulfate-reduced cleansing
See all personal care surfactant blends and hair conditioning chassis platforms.
Related Venus products
Explore co-surfactants & emulsifiers, detergent bases, personal care foaming agents, and viscosity builders for complete rinse-off systems. Pair with anionic surfactants and nonionic surfactants per your foam and mildness targets.
Technical resources
Read the amphoteric surfactants guide for formulation examples, CAPB quality notes, and salt-curve optimization. See also personal care surfactants guide and surfactant types comparison. Contact Venus for samples and blend recommendations.