What Is Ammonium C12-15 Pareth Sulfate?
Ammonium C12-15 Pareth Sulfate is a synthetic cleansing agent made by attaching ethylene oxide units to fatty alcohols that come from coconut or palm oil, then neutralizing the mixture with ammonium sulfate to create a water-soluble salt. The “C12-15” part refers to the length of the fatty alcohol chain, while “Pareth” signals that the molecule contains polyethylene glycol segments. First introduced in the late 20th century as a gentler alternative to older sulfates, it quickly gained popularity with formulators looking for effective yet mild surfactants. Production starts with naturally derived fatty alcohols that undergo ethoxylation, sulfation and finally neutralization, steps that convert oily raw materials into a clear or slightly cloudy liquid that blends easily with water.
You’ll most often spot Ammonium C12-15 Pareth Sulfate in shampoos, body washes, liquid hand soaps and facial cleansers. It also appears in bubble baths, exfoliating scrubs and some makeup removers where rich foam and quick rinse-off are important.
Ammonium C12-15 Pareth Sulfate’s Cosmetic Benefits/Uses
In personal care formulas this ingredient serves one main purpose: cleansing. It lowers the surface tension of water so oils, dirt and product buildup can be lifted from skin or hair and rinsed away with minimal effort. Its balanced chain length and moderate ethoxylation give it good foaming power while staying mild enough for daily use, helping products feel rich and luxurious without leaving skin overly tight or dry.
Who Can Use Ammonium C12-15 Pareth Sulfate
Most skin and hair types tolerate this cleansing agent well. Normal, oily and combination skin typically handle it without issue thanks to its moderate mildness and good rinse-off. Dry or very sensitive complexions may find any sulfate a bit stripping if used in high concentration or left on for long periods, so those users should look for formulas that pair it with moisturizers and soothing ingredients.
The compound is produced from plant-derived fatty alcohols and synthetic processing steps, so it is considered suitable for vegans and vegetarians. Always check the full ingredient list though, as other animal-based additives might appear in the same product.
Current safety data show no specific risks for pregnant or breastfeeding individuals when this surfactant is used in rinse-off products. That said, this is not medical advice and anyone who is expecting or nursing should review any skincare or personal care item with a qualified healthcare professional before use.
Ammonium C12-15 Pareth Sulfate does not increase photosensitivity, so there is no added need for extra sun protection beyond the usual daily SPF recommendation.
Potential Side Effects/Adverse Reactions
Reactions to topical Ammonium C12-15 Pareth Sulfate vary from person to person. The points below outline potential side effects that could occur, but they remain uncommon when the ingredient is used at appropriate levels in well-formulated products.
- Dryness or tight feeling especially on already dehydrated skin or hair
- Transient redness or irritation in individuals with compromised or highly sensitive skin barriers
- Stinging or watering eyes if the cleanser gets into the eyes during use
- Allergic contact dermatitis presenting as itching or rash in rare cases of true allergy
- Increased scalp flakiness when used frequently on very dry scalps
If any discomfort, rash or persistent irritation develops while using a product containing this ingredient stop use immediately and consult a healthcare professional.
Comedogenic Rating
Rating: 0/5
Ammonium C12-15 Pareth Sulfate is fully water soluble and does not leave behind fatty residues that can plug pores, so its chance of causing comedones is considered negligible.
For this reason it is generally fine for people who are prone to acne or frequent breakouts.
The fact that it is almost always used in rinse-off products adds another layer of safety because the ingredient spends only a short time on skin.
Summary
Ammonium C12-15 Pareth Sulfate is a surfactant that lifts oil, dirt and buildup so they wash away easily. Its chain length and light ethoxylation give it rich foam while keeping it gentler than older sulfate options.
It shows up in many everyday shampoos, body washes, facial cleansers and liquid soaps, a testament to how widely brands rely on it for effective yet mild cleansing at a friendly price.
Extensive safety reviews find it non-toxic and well tolerated in the small amounts used in rinse-off formulas, but skin can be unpredictable so it is always wise to do a quick patch test when trying any new product.