Hd
HDI/Trimethylol Hexyllactone Crosspolymer
HDI/Trimethylol Hexyllactone Crosspolymer
Tiny light-scattering spheres — soften the look of pores and fine lines, add powdery slip, and soak up some oil.
What it does
A synthetic powder of tiny round particles. They scatter light to soften the look of pores and fine lines, add a smooth, powdery slip, and can soak up some oil.
The EU’s ingredient database lists it as an anticaking agent (keeps powders from clumping).European Commission, CosIng (© European Union, CC BY 4.0) · uses put in plain words by Drop ↗
The evidence, graded
expert consensusUS safety reviewers (2016) judged 17 polymers made with HDI safe as used, HDI/trimethylol hexyllactone crosspolymer among them. HDI itself can cause asthma in people exposed to it at work. The reviewers found no leftover HDI in these polymers at levels that matter; in this one it was under 100 ppm. Patch tests of foundations with 10% and 30.7% of it found no irritation or allergy. It’s used at up to 31%, in foundations.Becker 2016 · Cosmetic Ingredient Review ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 1238 ingredients — grouped by what they do, each with whatever evidence we can cite.
This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.