What is D&C Red #19?
D&C Red #19 (INCI name: CI 45170) is a cosmetic colorant. A synthetic xanthene dye used in blushes and lip colour. At 2 it rates lower than the D&C reds most often blamed for cosmetic acne — 17, 21, 3, 30 and 36 — but it is still a pigment worth checking if blush or lipstick breaks you out.
You may see it on labels as D&C Red 19, D&C Red #19, D C Red 19, Ci 45170, so it can hide under more than one name in an ingredient list.
Where D&C Red #19 shows up
You'll most often find D&C Red #19 in lipsticks, blushes, and other colour cosmetics. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is D&C Red #19 bad for acne-prone skin?
Because it barely registers on the comedogenic scale, D&C Red #19 is generally a safe pick for breakout-prone skin and is often recommended as a gentler alternative to heavier ingredients.