Cleansing Agent

Magnesium Laureth-8 Sulfate

INCI: MAGNESIUM LAURETH-8 SULFATE

Reviewed by Daisy · Last updated 14 Aug 2026

Also known as: Magnesium Laureth-8 Sulfate

A gentle sulfate cleanser derived from magnesium and lauryl alcohol

Best For Skin Types

All, Oily, Combination

Addresses

Oil control

Usage Frequency

Daily

What Is Magnesium Laureth-8 Sulfate?

Magnesium Laureth-8 Sulfate is a mild anionic surfactant commonly used in cleansing products. It is derived from lauryl alcohol (a fatty alcohol) and magnesium, combined with sulfate chemistry to create a compound that helps lift oils and impurities from the skin surface.

As a surfactant, this ingredient works to reduce the surface tension of water, allowing cleansers to effectively remove makeup, sebum and environmental debris without requiring excessive rubbing or harsh formulations.

How It Works

Magnesium Laureth-8 Sulfate functions as an anionic surfactant. One end of its molecular structure is attracted to oil-based substances (makeup, sebum, sunscreen), whilst the other end is water-loving. This allows the ingredient to encapsulate impurities and suspend them in water, so they rinse away cleanly.

The magnesium component and the length of the ethoxylated chain (the "Laureth-8" designation) influence how mild the surfactant behaves on skin, making it less likely to cause irritation compared to shorter-chain or non-ethoxylated sulfates.

Clinical Evidence & References

Whilst magnesium compounds have been studied for various protective and anti-inflammatory effects in medical contexts, evidence specifically examining Magnesium Laureth-8 Sulfate in skincare products is limited. The available research does not directly address its efficacy or safety in topical cosmetic formulations at typical usage concentrations.

Its widespread inclusion in commercial cleansers suggests acceptable tolerability in practice, but formal clinical data on skin irritation, efficacy or long-term effects in this specific form would strengthen understanding of its performance in skincare.

How to Use

Use Magnesium Laureth-8 Sulfate-containing cleansers as part of your regular routine, typically once or twice daily depending on skin type and preference. Massage gently onto damp skin, then rinse thoroughly with lukewarm water. If your skin feels tight or uncomfortable after cleansing, consider reducing frequency or following with a hydrating toner or moisturiser.

Safety & Precautions

Magnesium Laureth-8 Sulfate is generally well-tolerated and considered a safer sulphate option for most skin types. Those with very reactive or severely compromised skin barriers may wish to patch test first.

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Other forms of Magnesium Laureth-8 Sulfate

These appear on ingredients lists under different names but are the same substance. Magnesium Laureth-8 Sulfate is the common form.

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