Ingredient review
TEA-C12-13 Alkyl Sulfate
INCI: TEA-C12-13 Alkyl Sulfate
A synthetic surfactant that effectively cleanses and foams, but may be drying or irritating for sensitive skin types.
In plain English
TEA-C12-13 Alkyl Sulfate is a cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It creates a rich lather in products like face washes and shampoos. While it is considered milder than sodium lauryl sulfate, it can still strip natural oils and may cause dryness or irritation, especially for those with sensitive or compromised skin.
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-C12-13 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-C12-13 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 anionic surfactant derived from fatty alcohols (C12-13) neutralized with triethanolamine (TEA). It belongs to the alkyl sulfate family, similar to sodium lauryl sulfate but with a slightly larger carbon chain that can be less irritating.
How it works
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be emulsified and washed away. Its negatively charged head group attracts water while the fatty tail attracts oils, creating stable foam and effective cleansing.
Pros
Effective cleanser
Removes excess oil, dirt, and makeup efficiently, leaving skin feeling clean.
Good foam quality
Produces a rich, creamy lather that many users find satisfying and easy to spread.
Cons and cautions
Potential for dryness
Can strip natural oils, leading to tightness or flakiness, especially with frequent use.
Moderate irritation risk
May cause stinging or redness for those with sensitive or compromised skin barriers.
Best for
- People with normal to oily skin who enjoy a foamy cleanser
- Those looking for an effective but slightly milder alternative to SLS
Use caution if
- Individuals with dry, sensitive, or eczema-prone skin
- Anyone who prefers sulfate-free or ultra-gentle cleansing routines
Usage tips
Safety summary
Generally recognized as safe for use in rinse-off cosmetics at typical concentrations. However, it can cause skin irritation and dryness in some individuals, particularly with prolonged exposure or on sensitive skin. The CIR panel has noted that irritation depends on concentration and formulation.
Research notes
Research indicates that alkyl sulfates with longer carbon chains (C12-13) are less irritating than shorter ones (C12). Studies show that TEA salts are milder than sodium salts. However, there is limited specific research on TEA-C12-13 Alkyl Sulfate alone; most data comes from broader alkyl sulfate studies.
Common label clues
- Typical concentration
- 1% to 15% depending on formulation and desired foam level
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) within specified concentration limits. The Cosmetic Ingredient Review (CIR) panel has evaluated alkyl sulfates and found them safe when formulated to be non-irritating.
- Common uses
- Facial cleansers, Body washes, Shampoos, Shower gels
- Environmental note
- As a synthetic surfactant, it may have moderate biodegradability. Some studies indicate that alkyl sulfates can be toxic to aquatic life at high concentrations, but typical rinse-off use results in low environmental impact.
Good to know
- TEA-C12-13 Alkyl Sulfate is considered a sulfate, so it may not be suitable for sulfate-free routines.
- The 'C12-13' refers to the carbon chain length, which influences mildness and foaming properties.
Common questions
What is TEA-C12-13 Alkyl Sulfate in beauty products?
TEA-C12-13 Alkyl Sulfate is a cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It creates a rich lather in products like face washes and shampoos. While it is considered milder than sodium lauryl sulfate, it can still strip natural oils and may cause dryness or irritation, especially for those with sensitive or compromised skin.
What does TEA-C12-13 Alkyl Sulfate do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt, sebum, and makeup to be emulsified and washed away. Its negatively charged head group attracts water while the fatty tail attracts oils, creating stable foam and effective cleansing.
Is TEA-C12-13 Alkyl Sulfate safe for most people?
Generally recognized as safe for use in rinse-off cosmetics at typical concentrations. However, it can cause skin irritation and dryness in some individuals, particularly with prolonged exposure or on sensitive skin. The CIR panel has noted that irritation depends on concentration and formulation.
Who should be careful with TEA-C12-13 Alkyl Sulfate?
Individuals with dry, sensitive, or eczema-prone skin Anyone who prefers sulfate-free or ultra-gentle cleansing routines
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.