Hydroxypropyl Bisstearyldimonium Chloride
INCI: HYDROXYPROPYL BISSTEARYLDIMONIUM CHLORIDE
Reviewed by Daisy · Last updated 2 Jun 2026
A conditioning agent that helps reduce static and improve hair manageability in formulations
Best For Skin Types
All
Addresses
Usage Frequency
Daily
What Is Hydroxypropyl Bisstearyldimonium Chloride?
Hydroxypropyl bisstearyldimonium chloride is a synthetic quaternary ammonium compound—often referred to as a quat. It is derived from stearyl alcohol (a fatty alcohol) and is designed to carry a positive electrical charge, which allows it to bind to hair and skin surfaces.
In skincare and haircare products, this ingredient functions primarily as an antistatic and conditioning agent. It works by coating the surface of hair fibres or skin, reducing friction and the static electricity that can cause frizz or flyaway hair. It is also used to improve the overall feel and texture of formulations.
How It Works
Hydroxypropyl bisstearyldimonium chloride is positively charged, which allows it to adhere to the negatively charged surfaces of hair and skin. This coating reduces friction between fibres and surfaces, which diminishes static electricity. The ingredient also leaves a light, conditioning film that can improve the sensory feel of a product during and after application.
Clinical Evidence & References
This ingredient is well-established in cosmetic formulation, and its antistatic and conditioning properties are widely documented in industry literature. However, dedicated clinical studies specifically assessing its efficacy or safety in skincare products are limited. Most evidence comes from formulation science and long-standing use in cosmetics rather than controlled dermatological trials.
The ingredient is generally recognised as safe for use in cosmetic products at typical concentrations, though formal third-party safety assessments on human skin are sparse.
Published Research
How to Use
This ingredient is typically used as part of a formulation rather than as a standalone product. It is usually found in conditioners, serums, and smoothing treatments. There are no special application instructions required; simply use the product as directed by the manufacturer.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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