Thiamine Bis-Laurylsulfate
INCI: THIAMINE BIS-LAURYLSULFATE
Reviewed by Kate · Last updated 2 Jun 2026
Also known as: Thiamine Bis-laurylsulfate
A preservative derived from thiamine that helps maintain product stability and shelf life
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What Is Thiamine Bis-Laurylsulfate?
Thiamine bis-laurylsulfate is a modified form of thiamine (vitamin B1) combined with laurylsulfate, a surfactant compound. In skincare formulations, it functions primarily as a preservative, helping to prevent microbial growth and extend product shelf life.
Unlike some preservative systems, this ingredient combines a water-soluble vitamin derivative with a surfactant base, which allows it to work within the aqueous phase of skincare products. It is used in relatively small concentrations within finished products.
How It Works
Thiamine bis-laurylsulfate operates as a preservative by inhibiting microbial proliferation in skincare products. The surfactant component disrupts microbial cell membranes, whilst the thiamine moiety may contribute to the overall antimicrobial efficacy of the system.
This ingredient is typically incorporated into water-based or hybrid formulations where its solubility profile allows it to distribute evenly throughout the product matrix.
Clinical Evidence & References
Research on thiamine bis-laurylsulfate specifically in topical skincare applications is limited. Available data on thiamine (vitamin B1) itself relates primarily to oral supplementation for neurological support rather than topical skincare use.
The preservative efficacy of this ingredient has been evaluated in product stability testing protocols, but peer-reviewed clinical evidence examining direct skin benefits in cosmetic concentrations is not well established. Its role is primarily functional—maintaining product safety—rather than delivering active skincare benefits.
How to Use
This ingredient is used by formulators rather than consumers; it appears in finished products at low concentrations as part of the preservative system. There is no specific guidance required for end users, as the ingredient is present in minimal amounts and is not a targeted active treatment.
Safety & Precautions
Frequently Asked Questions
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