What Is Ppg-28-Buteth-35?
Ppg-28-Buteth-35 is a synthetic ingredient created by linking together small units of propylene oxide with a touch of butyl alcohol at one end. Chemists call this type of chain a polyether, which simply means many ether links holding the chain together. The “28” and “35” in its name hint at the average number of repeating units in each portion of the molecule, giving formulators a good idea of its size and weight.
This ingredient came into cosmetic use in the late twentieth century when formulators searched for lightweight yet effective conditioners that felt silky rather than greasy. Polyethylene glycols were already popular, so researchers modified similar chemistry to develop this propylene-based version, which brought a smoother finish and worked well in both water-rich and oil-rich systems.
Manufacturing starts with propylene oxide reacting under controlled heat and pressure. By stopping the reaction at a set chain length and “capping” one end with butyl alcohol, producers fine-tune the final texture and solubility. The result is a clear to slightly hazy liquid that blends easily into most cosmetic bases.
You will most often spot Ppg-28-Buteth-35 in leave-in hair conditioners, rinse-off conditioners, styling creams, moisturizing shampoos, lightweight facial lotions, body moisturizers and occasionally in sheet masks or overnight hydrating treatments. Its adaptable nature lets it perform in sprays, serums and creams without weighing hair or skin down.
Ppg-28-Buteth-35’s Cosmetic Benefits/Uses
Formulators rely on Ppg-28-Buteth-35 for two main reasons that directly boost the feel and look of finished products.
- Hair conditioning: The ingredient forms a thin, flexible film along the hair shaft that smooths cuticles, reduces static and makes strands easier to detangle. Because the film is lightweight it does not leave hair limp, making it useful in both rinse-off and leave-in products.
- Skin conditioning: On skin it acts as a humectant and surface softener. It draws in a bit of moisture from the environment, then leaves behind a silky finish that helps lotions glide on smoothly without a greasy afterfeel.
Who Can Use Ppg-28-Buteth-35
Ppg-28-Buteth-35 is generally suitable for all skin types, including oily, dry, combination and sensitive skin, because it is lightweight and non occlusive. People with very reactive or allergy-prone skin should still keep an eye on how their skin feels, since any synthetic ingredient can cause problems for a small group of users.
The ingredient is produced entirely through chemical synthesis with no animal-derived feedstocks, so it fits the requirements of both vegetarian and vegan lifestyles. As always, animal testing policies vary by brand, so cruelty-free shoppers should confirm the finished product’s stance.
No specific warnings exist for topical use during pregnancy or while breastfeeding. Absorption through intact skin is considered minimal, yet this is not medical advice and anyone who is pregnant or nursing should run any new personal care product past a doctor to be on the safe side.
Ppg-28-Buteth-35 does not make skin more sensitive to sunlight and can be used alongside daytime or nighttime formulas without increasing the need for extra sun protection.
Potential Side Effects/Adverse Reactions
Side effects and reactions to topical Ppg-28-Buteth-35 can vary from person to person. The points below list potential issues, but most users will not experience them when the ingredient is used at normal levels in well-formulated products.
- Mild skin irritation such as slight redness or itching
- Stinging or burning on very compromised or freshly exfoliated skin
- Allergic contact dermatitis in individuals sensitive to polyether compounds
- Eye irritation if the product accidentally gets into the eyes
- Build-up or a heavy feel on fine hair when used in overly concentrated leave-in products
If any of these effects occur stop using the product and consult a healthcare professional or dermatologist for guidance.
Comedogenic Rating
Rating: 0–1 (very low)
Ppg-28-Buteth-35 is a large, water-soluble polyether that rinses cleanly and does not form a heavy, pore-blocking film. Its molecular structure keeps it sitting on the skin’s surface where it provides slip without trapping excess oil or dead cells, so it is considered non-comedogenic to minimally comedogenic. This makes it generally suitable for people prone to acne or breakouts.
Because it mixes well with both water and light oils, any final product texture will depend more on the overall formula than on this single ingredient. Extremely rich, waxy formulas may still clog pores even if they contain Ppg-28-Buteth-35.
Summary
Ppg-28-Buteth-35 acts mainly as a hair and skin conditioner. On hair it forms a thin flexible coating that smooths cuticles reduces static and improves slip. On skin it works as a mild humectant and surface softener helping lotions spread easily while leaving a silky feel.
While not as famous as silicones or classic PEGs, this ingredient shows up steadily in modern lightweight conditioners shampoos body creams and some facial lotions because it offers a smooth finish without heaviness.
Safety data and long-term use in cosmetics suggest a low risk of irritation or sensitization for most users. Still everyone’s skin is unique so patch testing a new product is always a smart idea before fully incorporating it into a routine.