Ingredient review
TEA-C12-15 Alkyl Sulfate
INCI: TEA-C12-15 Alkyl Sulfate
An effective foaming cleanser that can be drying or irritating for sensitive skin, but is generally considered safe in rinse-off products.
In plain English
This is a cleansing ingredient that helps create foam and remove dirt and oil from skin and hair. It belongs to the sulfate family, similar to sodium lauryl sulfate, but is slightly milder because it's neutralized with triethanolamine. However, it can still strip natural moisture and may cause irritation for some people, especially with frequent use.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
TEA-C12-15 Alkyl 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging TEA-C12-15 Alkyl Sulfate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic surfactant made by reacting a fatty alcohol (C12-15) with sulfuric acid, then neutralizing with triethanolamine (TEA). It is a common foaming agent in personal care products.
How it works
It works by reducing the surface tension between water and oil, allowing dirt and sebum to be lifted away and rinsed off. Its molecules have a water-loving head and an oil-loving tail, which trap grime and allow it to be washed away with water.
Pros
Effective foaming cleanser
Produces a rich lather that many people associate with a thorough clean, making it popular in shampoos and body washes.
Good oil removal
Efficiently dissolves excess sebum and non-water-soluble impurities, which can help with oily skin or heavy makeup removal.
Cons and cautions
Potential for dryness
Its strong cleansing action can strip the skin's natural moisture barrier, leading to tightness, flakiness, or irritation with frequent use.
Irritation risk for sensitive skin
Even though it's milder than sodium lauryl sulfate, it can still cause stinging, redness, or contact dermatitis in those with reactive skin.
Best for
- People with normal to oily skin who prefer a foamy cleanser
- Those using rinse-off products like shampoo or body wash and not experiencing irritation
Use caution if
- Individuals with dry, sensitive, or compromised skin barriers
- Anyone seeking a sulfate-free or ultra-gentle cleansing routine
Usage tips
Safety summary
Generally considered safe for use in rinse-off cosmetics at typical concentrations. The main concerns are skin irritation and dryness, especially for sensitive individuals. Trace contamination with 1,4-dioxane is regulated and kept to low levels in finished products.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated alkyl sulfates and found them safe for use in cosmetics when formulated to be non-irritating. Studies show that irritation potential increases with concentration and prolonged contact. No strong evidence links this ingredient to long-term health risks when used as directed.
Common label clues
- Typical concentration
- 1% to 15% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics by the FDA and the Cosmetic Ingredient Review (CIR) panel, with concentration limits typically set for rinse-off products. Manufacturers are required to keep 1,4-dioxane levels within safe limits (usually below 10 ppm).
- Common uses
- Shampoos, Body washes, Facial cleansers, Foaming bath products
- Environmental note
- As a synthetic surfactant, it may have moderate aquatic toxicity. It is not readily biodegradable in all conditions, though many wastewater treatment plants can break it down.
Good to know
- TEA-C12-15 Alkyl Sulfate is often used as a replacement for sodium lauryl sulfate (SLS) in 'milder' formulations, but it is still a sulfate and not suitable for all skin types.
- The 'C12-15' refers to the chain length of the fatty alcohols used, which affects its foaming and cleansing properties.
Common questions
What is TEA-C12-15 Alkyl Sulfate in beauty products?
This is a cleansing ingredient that helps create foam and remove dirt and oil from skin and hair. It belongs to the sulfate family, similar to sodium lauryl sulfate, but is slightly milder because it's neutralized with triethanolamine. However, it can still strip natural moisture and may cause irritation for some people, especially with frequent use.
What does TEA-C12-15 Alkyl Sulfate do in a beauty product?
It works by reducing the surface tension between water and oil, allowing dirt and sebum to be lifted away and rinsed off. Its molecules have a water-loving head and an oil-loving tail, which trap grime and allow it to be washed away with water.
Is TEA-C12-15 Alkyl Sulfate safe for most people?
Generally considered safe for use in rinse-off cosmetics at typical concentrations. The main concerns are skin irritation and dryness, especially for sensitive individuals. Trace contamination with 1,4-dioxane is regulated and kept to low levels in finished products.
Who should be careful with TEA-C12-15 Alkyl Sulfate?
Individuals with dry, sensitive, or compromised skin barriers Anyone seeking a sulfate-free or ultra-gentle cleansing routine
Research sources
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.