Common Name(s): Cahs,hydroxypropyl sultaine

CAS Number: 68139-30-0

DESCRIPTION

What It Does: Provides amphoteric foaming and conditioning with excellent compatibility across surfactant systems.

Why It's Used: Premium amphoteric surfactant for mild foaming shampoos and cleansers requiring broad surfactant compatibility and improved skin and eye tolerance vs capb alternatives.

How It Works: Amphoteric sultaine (internal zwitterion from quaternary ammonium + sulfonate) provides: foam stability and enhancement; antistatic conditioning on hair; mildness enhancement reducing ionic surfactant irritation; viscosity building with salt addition. superior eye tolerance vs capb (betaine).

Typically Found In: Baby shampoos,mild cleansers,eye-safe products

TECHNICAL DETAILS

Primary Category: Functional ingredient – amphoteric surfactant

Secondary Functions: Skin conditioning

Application Areas:

Typical Concentration Range: 2%–10%

SOURCING & ETHICS

Vegan Status: Conditional - supplier confirmation required

Halal Status: Unverified - supplier confirmation required

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier. [audit 2026-07-29 rev2: the record's own source_notes does not assert a non-animal origin, or instructs the reader to verify with the supplier; "yes" asserts knowledge the record does not hold. determination requires shariah-panel sign-off.]

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Cocamidopropyl hydroxysultaine's superior eye tolerance vs capb arises from its sultaine rather than betaine zwitterionic head group. the sulfonate anion (so3⁻ in sultaine) is a stronger acid group than the carboxylate (coo⁻ in betaine), providing greater charge neutralisation and better interaction with tear film proteins — the molecular basis for its improved eye irritation profile in baby and sensitive-eye formulations.

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