Quaternium-15
High ConcernAlso known as
quaternium-15quaternium 15
The concern
One of the most common formaldehyde-releasing preservatives. EWG rates it high concern. Known contact allergen; most frequent cause of contact dermatitis from preservatives according to ACDS.
What to look for on labels
This ingredient may appear under any of the following names or codes on product labels:
- Quaternium-15
- quaternium-15
- quaternium 15
Commonly found in
Hair straightening products, some shampoos and conditioners
Other formaldehyde releasers to know about
Data sourced from IARC, FDA, EFSA, WHO and EWG public data. For informational purposes only. This does not constitute medical or legal advice.