Ingredient review

Ammonium Laureth-12 Sulfate

INCI: AMMONIUM LAURETH-12 SULFATE

A common foaming cleanser that is milder than SLS but can still be drying for sensitive skin.

beautyskincarecleanser

In plain English

Ammonium Laureth-12 Sulfate is a synthetic detergent that helps shampoos and body washes lather up and remove oil and dirt. It's a gentler cousin of Sodium Lauryl Sulfate (SLS) because it has extra ethylene oxide groups that make it less harsh on skin. However, it can still strip natural oils if used too often, especially for dry or sensitive skin types.

Quick decision guide

Useful, but context matters

Ammonium Laureth-12 Sulfate can be useful, but watch for some irritation potential.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Ammonium Laureth-12 Sulfate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic anionic surfactant derived from lauryl alcohol, ethoxylated with 12 moles of ethylene oxide, and neutralized with ammonium hydroxide. It belongs to the alkyl ether sulfate family.

How it works

It works by reducing the surface tension between water and oil, allowing dirt and sebum to be rinsed away. The ethoxylation (12 EO units) makes it milder than shorter-chain sulfates, producing a rich foam while being less irritating.

Pros

Effective cleanser

Removes dirt, oil, and makeup efficiently, leaving skin feeling clean.

Gentler than SLS

The 12 EO units reduce irritation potential compared to standard SLS, making it a better choice for daily use.

Cons and cautions

Can be drying

Overuse may strip natural oils, leading to tightness or flakiness, especially in dry climates.

Not for sensitive skin

Even with milder properties, it can still cause stinging or redness for those with reactive skin.

Best for

  • People with normal to oily skin who enjoy a foamy cleanser
  • Those looking for a budget-friendly, effective cleanser

Use caution if

  • Individuals with dry, sensitive, or compromised skin barriers
  • Those with eczema or rosacea who prefer non-foaming cleansers

Usage tips

Use only on wet skin and rinse thoroughly to minimize residue.
Follow with a moisturizer to replenish hydration after cleansing.
Avoid using more than twice daily to prevent over-cleansing.

Safety summary

Generally safe for most skin types when used in rinse-off products. Mild irritation possible for sensitive individuals. Avoid contact with eyes.

Research notes

Studies show that ethoxylation reduces skin irritation compared to SLS, but high concentrations or frequent use can still compromise barrier function. Considered safe within regulated limits.

Common label clues

Typical concentration
5-15% in rinse-off products
Regulatory status
Approved for use in cosmetics by the FDA and EU CosIng database at concentrations up to 15% in rinse-off products.
Common uses
Shampoos, Body washes, Facial cleansers, Bubble baths
Environmental note
Synthetic surfactant; not readily biodegradable in all conditions, but less persistent than some older sulfates.

Good to know

  • Often listed as 'Ammonium Laureth Sulfate' on labels; the '12' indicates the degree of ethoxylation.
  • Common in professional salon shampoos due to its balance of foam and mildness.

Common questions

What is Ammonium Laureth-12 Sulfate in beauty products?

Ammonium Laureth-12 Sulfate is a synthetic detergent that helps shampoos and body washes lather up and remove oil and dirt. It's a gentler cousin of Sodium Lauryl Sulfate (SLS) because it has extra ethylene oxide groups that make it less harsh on skin. However, it can still strip natural oils if used too often, especially for dry or sensitive skin types.

What does Ammonium Laureth-12 Sulfate do in a beauty product?

It works by reducing the surface tension between water and oil, allowing dirt and sebum to be rinsed away. The ethoxylation (12 EO units) makes it milder than shorter-chain sulfates, producing a rich foam while being less irritating.

Is Ammonium Laureth-12 Sulfate safe for most people?

Generally safe for most skin types when used in rinse-off products. Mild irritation possible for sensitive individuals. Avoid contact with eyes.

Who should be careful with Ammonium Laureth-12 Sulfate?

Individuals with dry, sensitive, or compromised skin barriers Those with eczema or rosacea who prefer non-foaming cleansers

Research sources

CosIng - Ammonium Laureth-12 SulfateOpenPubMed - Surfactant irritation comparisonOpenFDA - Cosmetic Ingredient ReviewOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.