Ingredient dictionary

Magnesium Chloride

A simple mineral salt made from magnesium and chlorine. In shampoos and conditioners it mainly works as a thickener, helping the formula reach a smooth, pourable texture. It is on the label of 6 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Magnesium Chloride does

Builds thickness in shampoo and conditioner
Adjusts texture and how it pours

Magnesium chloride is a mineral salt. It is obtained from seawater and natural mineral brines, then purified for use in personal care. It is built from magnesium and chlorine, two elements found throughout the earth and oceans.

Formulators use it mainly as a thickener. Salts like this help water-based surfactant systems reach a smoother, more pourable texture, so a shampoo or conditioner feels richer in the hand. It dissolves easily in water and has no scent of its own.

Good for

Suits anyone who likes a thicker, richer feel in shampoo and conditioner. It is generally well tolerated by most hair and scalp types.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is magnesium chloride safe in shampoo?

It is a common, well-tolerated ingredient in shampoo and conditioner. It is used in small amounts to adjust thickness. As with any product, a patch test is a good idea if your skin is sensitive.

Will magnesium chloride make my shampoo thicker?

Usually, yes. It helps the formula reach a thicker, smoother texture. Thickness also comes from other ingredients, so it is one part of the overall feel. Thickness does not tell you how well a shampoo cleans.