Quaternium-15
Quaternium-15 is a formaldehyde-releasing preservative used in cosmetics and personal care products. It helps prevent the growth of bacteria, yeast, and mold, extending product shelf life. It works by slowly releasing small amounts of formaldehyde, which acts as an antimicrobial agent.
PreservativeVegan
RiskSerious 3.5 / 4
Sensitization i3.5 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Irritation i2.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Systemic exposure i1.5 / 4
Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.
Rated by SpottyLabs' ingredient methodology, independent of brands.
Things to watch
- Known allergen
- Formaldehyde releaser
- Potential for skin irritation
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Frequently asked questions
- Why is Quaternium-15 used in cosmetics?
- Quaternium-15 is used as a preservative to prevent microbial contamination in cosmetic products, ensuring their safety and extending their shelf life.
- Is Quaternium-15 safe to use?
- Quaternium-15 is a known allergen and a formaldehyde-releasing preservative. While regulated for use, it can cause contact dermatitis in sensitive individuals and has been linked to concerns regarding formaldehyde exposure.
