What is Isostearyl Neopentanoate?
Chemically, Isostearyl Neopentanoate is a synthetic emollient ester. A branched emollient ester named on pore-clogging lists in the moderate range.
You may see it on labels as Isostearyl Neopentanoate, Isostearyl Isostearate, Neopentanoate, so it can hide under more than one name in an ingredient list.
Where Isostearyl Neopentanoate shows up
Isostearyl Neopentanoate is commonly formulated into lotions, sunscreens, primers, and colour cosmetics, where it adds a smooth, non-greasy slip. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is Isostearyl Neopentanoate bad for acne-prone skin?
Isostearyl Neopentanoate sits in the grey zone. Plenty of people tolerate it well; those who break out easily may prefer to keep it low on their ingredient lists.
Worth flagging: Isostearyl Neopentanoate's rating is disputed. Credible sources land on different numbers, which is why we show a range rather than a single score — and why your own experience is the best tiebreaker.
Note for fungal-acne (malassezia) sufferers: Isostearyl Neopentanoate is commonly avoided in fungal-acne routines, since it falls into the fatty-acid or ester families the yeast can feed on. The evidence there is looser than for comedogenicity — see our fungal-acne checker for context.
Non-comedogenic alternatives
If you're avoiding Isostearyl Neopentanoate, these lower-risk ingredients serve a similar role and are gentler on pore-prone skin:
- Caprylic/Capric Triglyceride — rated 1/5 (Low risk).
- Squalane — rated 1/5 (Low risk).