Common Name(s): Potassium toluenesulfonate,pts,potassium methylbenzenesulfonate

CAS Number: 16106-44-8

DESCRIPTION

What It Does: Keeps surfactant-based products clear and easy to pour by improving ingredient mixing.

Why It's Used: Used as a hydrotrope in shampoos and liquid cleansers to improve cloud point and reduce viscosity.

How It Works: Toluenesulfonate anion disrupts micellar aggregation; potassium salt provides slightly different ionic compatibility than sodium form in high-electrolyte systems.

Typically Found In: Shampoos,liquid cleansers,surfactant concentrates

TECHNICAL DETAILS

Primary Category: Functional ingredient – surfactant

Secondary Functions: Hydrotrope,viscosity controlling

Application Areas:

Typical Concentration Range: 0.5%–5%

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Synthetic; toluene sulfonation followed by potassium neutralization.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating at typical use levels.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

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

Works Well With: Anionic surfactants,amphoteric surfactants

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Potassium versus sodium toluenesulfonates show similar hydrotrope efficiency; choice depends on formulation electrolyte balance and desired cloud point behavior.

Last Verified: Cosing database,inci dictionary,cas 16106-44-8

Primary Sources: 2026-03-27