Ingredient review
Sodium C12-13 Pareth-5 Carboxylate
INCI: SODIUM C12-13 PARETH-5 CARBOXYLATE
A gentle, effective surfactant that cleans without stripping the skin's natural moisture barrier.
In plain English
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It's designed to be less harsh than traditional soaps, making it a good choice for sensitive or dry 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.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium C12-13 Pareth-5 Carboxylate is generally a lower-concern ingredient when the full formula suits your skin.
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 Sodium C12-13 Pareth-5 Carboxylate.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
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
Sodium C12-13 Pareth-5 Carboxylate is a semi-synthetic surfactant made by reacting fatty alcohols (from coconut or palm oil) with ethylene oxide and then adding a carboxylate group. It belongs to the class of ether carboxylates, known for their mildness.
How it works
In a cleanser, this molecule has a water-loving head and an oil-loving tail. When you lather it with water, the tails grab onto oils and dirt on your skin, while the heads stay in the water. Rinsing then washes away the trapped impurities without overly drying the skin.
Pros
Mild on skin
Unlike harsher sulfates, this surfactant cleans effectively while respecting the skin's barrier, reducing the risk of tightness or irritation after washing.
Good lather
It produces a rich, creamy foam that feels luxurious on the skin, making the cleansing experience pleasant without excessive drying.
Cons and cautions
Processing concerns
The manufacturing process involves ethylene oxide, which can form trace amounts of 1,4-dioxane (a potential contaminant). Reputable brands purify to safe levels, but it's a consideration for purity-conscious consumers.
Not fully natural
As a semi-synthetic ingredient, it won't appeal to those seeking 100% natural or organic formulations.
Best for
- People with normal to dry skin
- Those looking for a sulfate-free cleanser
Use caution if
- Individuals with known allergies to ethoxylated ingredients (rare)
Usage tips
Safety summary
Sodium C12-13 Pareth-5 Carboxylate is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation potential. The main safety consideration is the potential presence of 1,4-dioxane as a byproduct, but reputable manufacturers purify to trace levels well within safety limits.
Research notes
Ether carboxylates like this ingredient have been studied for their mildness and compatibility with skin. Research shows they cause less protein denaturation and barrier disruption compared to traditional sulfates. However, most evidence comes from industry studies rather than independent clinical trials.
Common label clues
- Typical concentration
- 1-10% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database. Manufacturers must ensure low levels of 1,4-dioxane (typically below 10 ppm) per industry guidelines.
- Common uses
- Facial cleansers, Body washes, Shampoos, Micellar waters
- Environmental note
- Derived from plant-based fatty alcohols (often palm or coconut), so sourcing can impact deforestation. Look for RSPO-certified palm or sustainably sourced coconut in the supply chain.
Good to know
- Often listed near the top of ingredient lists in mild cleansers, indicating it's a primary surfactant.
- Can be combined with other mild surfactants to create a balanced cleansing system.
Common questions
What is Sodium C12-13 Pareth-5 Carboxylate in beauty products?
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It's designed to be less harsh than traditional soaps, making it a good choice for sensitive or dry skin.
What does Sodium C12-13 Pareth-5 Carboxylate do in a beauty product?
In a cleanser, this molecule has a water-loving head and an oil-loving tail. When you lather it with water, the tails grab onto oils and dirt on your skin, while the heads stay in the water. Rinsing then washes away the trapped impurities without overly drying the skin.
Is Sodium C12-13 Pareth-5 Carboxylate safe for most people?
Sodium C12-13 Pareth-5 Carboxylate is considered safe for use in cosmetics at typical concentrations. It is a mild surfactant with low irritation potential. The main safety consideration is the potential presence of 1,4-dioxane as a byproduct, but reputable manufacturers purify to trace levels well within safety limits.
Who should be careful with Sodium C12-13 Pareth-5 Carboxylate?
Individuals with known allergies to ethoxylated ingredients (rare)
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.