Quaternium-18
Quaternium-18 is a quaternary ammonium compound primarily used in hair care products as a conditioning agent. It helps to detangle hair, reduce static, and improve overall manageability and feel. This ingredient can also function as a suspending agent in formulations.
Hair conditioning agent
RiskModerate 1.5 / 4
Irritation i0.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Rated by SpottyLabs' ingredient methodology, independent of brands.
What it helps with
- conditions hair
- detangles hair
- reduces static
- improves manageability
Things to watch
- potential for scalp irritation
- can cause buildup on hair
See how this matches your skin
Find out exactly what you put onto your skin. Scan any product before you buy. Free and independent — no brand is paying us. Available on Android and iOS.
