A pyrimidine derivative used as a hair- and skin-conditioning ingredient and regulated in Annex III.
What it is
Diaminopyrimidine oxide is 2,4-diaminopyrimidine 3-oxide, a small heterocyclic compound with two amino groups and an N-oxide group on a pyrimidine ring. CosIng lists it as a hair-conditioning and skin-conditioning ingredient. In the EU it is covered by an entry in Annex III (substances subject to restrictions).
Where it is used
Found in a small number of hair care products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
See the EU regulation section for the applicable limits; according to the EU data, the Annex III entry concerns hair products.
Functions
- Hair conditioning
- Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
- Skin conditioning
- Maintaining the skin in good condition.
EU regulation
EU · Annex III, entry 932,4-Pyrimidinediamine, 3-oxide
- Product type
- Hair products
- Maximum concentration
- 1.5%
- As of
- 3 November 2026 · (EC) 2009/1223
Products with this ingredient (3)
- Zestaw 3x stymulujące serum przeciw wypadaniu włosów, 5% kompleksu peptydów egzosomowych, 1% adenozyny, biotynylowany peptyd, kopexil, Aktywacja i Wzmocnienie · BasicLab
- Stymulujące serum przeciw wypadaniu włosów, 5% kompleksu peptydów egzosomowych, 1% adenozyny, biotynylowany peptyd, kopexil · BasicLab
- L’Oréal Paris Elseve Komple Direnç Anti-Hair Fall Care Shampoo · L'Oréal