What Is Sodium Peg-3 Lauramide Carboxylate?
Sodium Peg-3 Lauramide Carboxylate is a synthetic ingredient made by reacting lauric acid, a fatty acid commonly sourced from coconut or palm kernel oil, with ethylene oxide and then neutralizing the result with sodium. The “Peg-3” part means that an average of three ethylene oxide units are attached, which helps the molecule mix well with both water and oil. First explored in the 1970s when formulators looked for milder alternatives to traditional soaps, it gained popularity thanks to its gentle cleansing power and ability to stabilize blends that contain both water and oil.
The manufacturing process starts with purified lauric acid that is converted to lauramido propylamine, followed by controlled ethoxylation to add the three ethylene oxide units. A final carboxylation step introduces the carboxylate group, then sodium is added to create the water-soluble salt used in cosmetics. Because the reaction steps are well defined and the raw materials are widely available, the ingredient is relatively affordable and consistent in quality.
You will most often see Sodium Peg-3 Lauramide Carboxylate in facial cleansers, body washes, micellar waters, baby shampoos, makeup removers, clay or sheet masks and even in some lightweight moisturizers where a gentle foaming action is needed. Its compatibility with many surfactants and oils lets formulators create clear gels, creamy emulsions or low-foam lotions without harshness.
Sodium Peg-3 Lauramide Carboxylate’s Cosmetic Benefits/Uses
Formulators choose this ingredient because it performs two key jobs that improve how a product feels and works on the skin.
- Cleansing: It lowers surface tension so water can mix with dirt, oil and makeup then lift them away. The molecule’s mild nature means it cleans without stripping the skin’s natural barrier which is why it is common in products for sensitive or dry skin.
- Emulsifying: It helps keep oil and water phases blended, preventing separation in lotions, gels and washes. This stabilizing effect ensures a smooth texture during shelf life and a consistent experience every time the product is used.
Who Can Use Sodium Peg-3 Lauramide Carboxylate
This ingredient is generally well tolerated by all skin types. Its mild cleansing action makes it a good fit for dry or sensitive skin while its ability to cut through oil still benefits combination and oily complexions. There are no specific skin types that must avoid it unless an individual has a known sensitivity to surfactants.
Sodium Peg-3 Lauramide Carboxylate is vegan and vegetarian friendly because it is made from plant-derived fatty acids, typically coconut or palm kernel oil, and petrochemical ethylene oxide rather than animal sources.
The molecule stays mainly on the surface of the skin and is not known to enter the bloodstream in meaningful amounts, so it is considered low risk for pregnant or breastfeeding women. This is not medical advice and anyone who is pregnant or nursing should ask a doctor before adding new skincare products.
The ingredient does not cause photosensitivity and will not make skin more prone to sunburn. It also plays well with most other common cosmetic ingredients, including acids, retinoids and botanical extracts.
Potential Side Effects/Adverse Reactions
Reactions to topical Sodium Peg-3 Lauramide Carboxylate differ from person to person. The points below outline potential side effects but most users will not experience them when the ingredient is used at typical cosmetic levels.
- Mild skin irritation Redness or a stinging sensation may occur on very sensitive or compromised skin, especially if the formula contains a high percentage of surfactants
- Eye discomfort Contact with the eyes can cause temporary watering or burning, common to many cleansing agents
- Dryness or tightness Over-cleansing or leaving the product on the skin for an extended period might strip natural oils leading to a dry feeling
- Allergic contact dermatitis Rare cases of rash or itching have been reported when someone is specifically allergic to this class of ingredients
- Trace 1,4-dioxane contamination Poor manufacturing controls can leave tiny amounts of this process by-product though reputable brands keep levels far below safety limits
If any discomfort or unusual reaction appears stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
Sodium Peg-3 Lauramide Carboxylate is highly water soluble and quickly rinses off the skin so it is unlikely to lodge inside pores and create blockages. Its molecular structure lacks heavy oils or waxy chains that typically contribute to comedogenicity which is why it earns a low score of 1. This makes it generally suitable for acne-prone or breakout-prone skin.
Formulas that pair it with richer emollients could still feel heavy depending on the overall blend so always consider the entire product when assessing pore-clogging potential.
Summary
Sodium Peg-3 Lauramide Carboxylate acts mainly as a cleanser and emulsifier. The Peg-3 segment lets it bridge water and oil helping it lift away dirt makeup and excess sebum while its carboxylate end keeps oil and water phases mixed for stable formulas. These dual traits give products a gentle yet effective cleansing profile.
It is a fairly common choice in face washes body cleansers and micellar waters although it is not as famous as blockbuster surfactants like Sodium Laureth Sulfate. Brands that focus on mild or sensitive skin formulas appreciate its balance of gentleness and performance so you will often see it in niche and baby care lines.
Safety reviews show it is low risk for irritation or systemic absorption when used at cosmetic levels. Still individual reactions are possible so do a quick patch test whenever trying a new product that contains it just to be safe.