What a 2/5 rating means
On the comedogenic scale, a 2 is still within the non-comedogenic range that dermatologists generally consider low-risk. That places Bismuth Oxychloride in the range most people, including many with acne-prone skin, tolerate well.
This rating is disputed. Credible sources land on different numbers for Bismuth Oxychloride, so we publish the range (2) rather than a false single figure. When sources disagree this openly, your own experience carries real weight.
One thing the number cannot tell you is concentration. Ingredients are listed in descending order, so Bismuth Oxychloride near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About Bismuth Oxychloride
It is a mineral-based ingredient, common in pigments and sun protection. A pearlising pigment common in mineral makeup that some acne-prone users find irritating and pore-clogging; often flagged in the low-moderate range.
On a label it can read as Bismuth Oxychloride, Bismuth — worth knowing when you scan an ingredient deck.
Bismuth Oxychloride in makeup and skincare
It is central to mineral makeup, pressed powders, and mineral sunscreens. Its irritancy is rated separately at 2/5, which is low.