What Is Sodium C10-13 Alkyl Benzenesulfonate?
Sodium C10-13 Alkyl Benzenesulfonate is a synthetic surfactant made by attaching a chain of 10 to 13 carbon atoms to a benzenesulfonic acid group then neutralizing the mixture with sodium hydroxide. This creates a water-soluble salt that mixes readily with oils and dirt. First introduced in the mid-20th century as part of the shift from soap-based cleaners to more efficient synthetic detergents, it quickly found a place in household and personal care products. Production begins with petrochemical feedstocks that are alkylated to form linear alkylbenzenes, which are then sulfonated and finally converted to their sodium salt form. In cosmetics you will spot it most often in facial cleansers, body washes, shampoos, bubble baths and makeup-removing wipes, where it acts as a primary cleansing agent or boosts the foam of milder surfactants.
Sodium C10-13 Alkyl Benzenesulfonate’s Cosmetic Benefits/Uses
This ingredient is valued for keeping skin and hair free of unwanted residue.
- Cleansing: Reduces surface tension so water can lift away oil, sweat and product buildup, leaving skin or hair feeling fresh and clean while helping other active ingredients spread evenly.
Who Can Use Sodium C10-13 Alkyl Benzenesulfonate
This surfactant works best for oily, combination and normal skin types because it excels at lifting excess sebum. People with very dry or easily irritated skin may find it a bit too strong since it can strip away natural oils and leave the surface feeling tight. Hair that is fine or prone to buildup generally tolerates it well while heavily processed or extremely dry strands might prefer a gentler cleanser.
Sodium C10-13 Alkyl Benzenesulfonate is made entirely from synthetic, petroleum-derived feedstocks with no animal components or by-products so it is suitable for vegans and vegetarians.
The ingredient is not known to pose specific risks for pregnant or breastfeeding women when used in rinse-off or leave-on cosmetics. This is not medical advice and anyone who is pregnant or nursing should review any skincare product with a healthcare professional just to be safe.
It does not increase photosensitivity so routine sun exposure precautions remain unchanged. Because it rinses away fully it is also unlikely to interfere with other topical actives applied afterward.
Potential Side Effects/Adverse Reactions
Responses to topical Sodium C10-13 Alkyl Benzenesulfonate differ from person to person. The issues listed below are possible yet uncommon when a product is properly formulated and used as directed.
- Dryness or tightness caused by removal of too much natural oil
- Temporary redness or stinging, especially on sensitive or broken skin
- Eye irritation if the cleanser runs into the eyes
- Contact dermatitis in individuals allergic to sulfonate detergents
- Fading of fresh hair color when used in shampoos for dyed hair
If any undue irritation or discomfort occurs stop using the product and consult a medical professional.
Comedogenic Rating
Rating: 0-1 (very low)
Sodium C10-13 Alkyl Benzenesulfonate is a highly water-soluble surfactant that is designed to break up oils then rinse away cleanly, leaving little to no residue on skin. Because it does not sit in pores or form an occlusive film its tendency to trigger blackheads or pimples is minimal. For most acne-prone users it should be well tolerated, especially in rinse-off products.
Extra note: like many foaming agents it can leave skin feeling tight if overused which may prompt some people to produce more oil, but that is an indirect effect rather than true pore clogging.
Summary
Sodium C10-13 Alkyl Benzenesulfonate is a synthetic surfactant whose main job is cleansing. It lowers surface tension so water can pick up dirt, oil, sweat and leftover products then whisk them away, which also helps other ingredients spread evenly and foam better. You will see it most often in budget-friendly face washes, body washes and shampoos thanks to its strong cleaning power, good foaming action and low cost, though higher-end brands often opt for milder alternatives.
Overall safety is considered high when the ingredient is used in well-formulated cosmetics. Reported reactions are usually limited to dryness or irritation in sensitive skin, and the risk of clogged pores is low. As with any new skincare product it is smart to patch test first so you can make sure your skin agrees with the formula.