What Is Hydrogenated Dimer Dilinoleth-30?
Hydrogenated Dimer Dilinoleth-30 is a man-made ingredient created by linking together fatty alcohols that come from linoleic acid, a fatty acid found in vegetable oils. Chemists first hydrogenate the fatty acids to make them more stable, then join two of these molecules to form a “dimer.” This dimer is turned into an alcohol and finally reacted with about 30 units of ethylene oxide, giving the material its water-friendly, polyethylene glycol side. The result is a waxy liquid that can mix both with oils and with water.
The beauty industry began using this type of molecule in the late 20th century when formulators were looking for gentle cleansers that could also help oil and water hold together. Its balanced structure makes it handy in modern skincare where lightweight textures are prized.
You will mainly find Hydrogenated Dimer Dilinoleth-30 in facial cleansers, cream and gel moisturizers, makeup removers, clay masks and rinse-off scrubs. It is also used in some hair conditioners and styling creams that need a smooth, non-greasy feel.
Hydrogenated Dimer Dilinoleth-30’s Cosmetic Benefits/Uses
This ingredient adds more than one benefit to a formula
- Cleansing: Its water-loving and oil-loving parts attach to dirt and makeup while staying soluble in water, helping them rinse away without harsh rubbing
- Emulsifying: It keeps oily ingredients evenly mixed with water so creams and lotions stay smooth, stable and pleasant to spread
Who Can Use Hydrogenated Dimer Dilinoleth-30
This ingredient is considered friendly for most skin types, including dry, normal, combination and oily skin. Its balanced oil-and-water structure means it cleanses without stripping so even sensitive skin usually tolerates it. People with very reactive or allergy-prone skin should still check the full ingredient list of a product because reactions are personal, not because Hydrogenated Dimer Dilinoleth-30 is known to be harsh.
The raw material is made from plant-derived fatty acids then chemically processed, so it is suitable for vegans and vegetarians. No animal-based substances are used in its manufacture.
There is no data showing that topical use poses a risk for pregnant or breastfeeding women when used in normal cosmetic amounts. This is not medical advice and anyone who is pregnant or nursing should have their healthcare provider review any skincare they plan to use to be extra safe.
Hydrogenated Dimer Dilinoleth-30 does not make skin more sensitive to sunlight so it has no known link to photosensitivity. It can be used day or night without special sun precautions beyond regular sunscreen habits.
Potential Side Effects/Adverse Reactions
Side effects from topical Hydrogenated Dimer Dilinoleth-30 can vary between individuals. The points below cover potential reactions though these are uncommon for most users when the ingredient is properly formulated in a cosmetic.
- Mild skin irritation such as redness or stinging in very sensitive users
- Contact dermatitis in rare cases of individual allergy
- Eye irritation if a cleanser containing the ingredient gets into the eyes
If any discomfort, rash or irritation appears stop using the product and consult a healthcare professional if symptoms persist.
Comedogenic Rating
Rating: 1/5
Hydrogenated Dimer Dilinoleth-30 carries a very low risk of clogging pores. Its large, water-compatible polyethylene glycol segment helps it rinse off cleanly, while the fatty portion is highly branched and less likely to pack tightly into pores. Because it is usually used at modest levels and often in rinse-off or lightweight leave-on formulas, the likelihood of it triggering blackheads or pimples is minimal.
Bottom line: it is generally considered suitable for skin that is prone to acne or breakouts.
Keep in mind that the overall comedogenicity of a finished product depends on the full ingredient blend and how long it stays on the skin, so a low-risk ingredient can still feel heavy if paired with richer oils or waxes.
Summary
Hydrogenated Dimer Dilinoleth-30 works in two main ways: it acts as a mild cleanser by surrounding grime and makeup so they can be rinsed away, and it serves as an emulsifier that keeps water and oil evenly mixed for smooth, stable textures. Its dual nature comes from a fatty backbone that loves oil and a polyethylene glycol chain that loves water, giving formulators a versatile tool for lightweight creams, gels and cleansers.
While not a household name, it shows up in a fair number of modern skincare and haircare products because it delivers reliable performance without a greasy feel. It tends to fly under the radar compared with buzzier actives, yet chemists appreciate its gentle, workhorse qualities.
Current research and cosmetic usage data point to a strong safety profile with very low irritation or sensitization rates. Still, everyone’s skin is unique, so it is smart to patch test any new product that contains this or any other ingredient to make sure it plays well with your complexion.