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Cetrimonium Chloride in skincare
Lighter-weight cationic conditioner for fine hair; less buildup than behentrimonium; also mild preservative.
Used in rinse-off conditioners and leave-in hair products. AM and PM appropriate. More water-soluble and less substantive than behentrimonium chloride. Deposits a lighter conditioning film, suitable for fine or easily weighed-down hair. In leave-on products, concentrations above 0.25% can be mildly irritating. Keep low in leave-on formulas.
What it is
Cetrimonium Chloride (CTAC, cetyltrimethylammonium chloride) is a C16-chain quaternary ammonium cationic conditioning agent that provides effective but less tenacious conditioning than the longer C22 behentrimonium chloride. Its lighter, more water-soluble character means it rinses out more cleanly, making it preferred for fine, easily weighed-down, or oily hair types. Also functions as a mild broad-spectrum preservative (especially antibacterial). FDA-approved preservative in rinse-off products. Higher concentrations (>0.25% in leave-on products) can cause mild irritation. Formulations keep leave-on concentrations low. CIR Expert Panel reviewed cetrimonium chloride as safe in cosmetic products. Minor cross-reactivity with other quaternary ammonium compounds has been reported in sensitized individuals. Typically used at 0.25–2% in conditioners.
The facts
| Category | Cationic Conditioning Agent / Preservative |
| Typical use | Morning and evening |
| Concentration YARAI treats as a full dose | 2% |
Why the amount matters, not just the presence
Most ingredient checkers tell you whether something is in the bottle. That is a smaller question than it sounds. Cetrimonium Chloride at 2% and cetrimonium chloride at a trace level are not the same ingredient in any way that affects your skin.
An ingredient list is ordered by quantity, so position carries real information. YARAI reads that position and scores accordingly, which is why the same ingredient can land differently in two different products.
The honest limit: a list gives order, not percentages. Estimating concentration from position is an estimate. It is a better estimate than ignoring position, and it is still an estimate. We would rather tell you that than let a number look more certain than it is.
Common questions
What does cetrimonium chloride do in a skincare product?
Lighter-weight cationic conditioner for fine hair; less buildup than behentrimonium; also mild preservative.
How much cetrimonium chloride should a product contain?
YARAI treats 2% as a full dose for this ingredient. Below that, the ingredient is present but is scored as contributing less. An ingredient list gives you the order of ingredients, not their percentages, so this is an estimate read from position rather than a measurement.
When should I use cetrimonium chloride?
Used in rinse-off conditioners and leave-in hair products. AM and PM appropriate. More water-soluble and less substantive than behentrimonium chloride. Deposits a lighter conditioning film, suitable for fine or easily weighed-down hair. In leave-on products, concentrations above 0.25% can be mildly irritating. Keep low in leave-on formulas.
Check your own products
Point your camera at a product. YARAI identifies it from the label, finds that product's full ingredient list from published sources, and scores it. No barcode and no box needed, which is how it handles imported and small-brand products.
Concern level, category and thresholds on this page are read directly from the same data the YARAI app scores with, so this page and the app cannot disagree. EU figures cite Regulation (EC) No 1223/2009. Last built 2026-09-09. Nothing here is medical advice.