Is Quaternium-15 Safe? What You Need to Know
Safety Score
Concern Level: very-high
Quaternium-15 has significant safety concerns. We recommend avoiding products containing this ingredient.
What Is Quaternium-15?
A formaldehyde-releasing preservative and the most common cause of cosmetic contact dermatitis in North America.
Commonly found in: shampoo, conditioner, moisturizers, baby products
Safety Research & Evidence
A formaldehyde-releasing preservative and the most common cause of cosmetic contact dermatitis in North America.
Regulatory status: Not restricted by FDA; EU limits formaldehyde release
Health Concerns
formaldehyde releaser
Evidence: StrongResearch indicates formaldehyde releaser may be associated with exposure to Quaternium-15. Particularly concerning for eczema patients, children, those with formaldehyde allergy.
contact allergen
Evidence: StrongResearch indicates contact allergen may be associated with exposure to Quaternium-15. Particularly concerning for eczema patients, children, those with formaldehyde allergy.
skin sensitization
Evidence: StrongResearch indicates skin sensitization may be associated with exposure to Quaternium-15. Particularly concerning for eczema patients, children, those with formaldehyde allergy.
Vulnerable Populations
Extra caution recommended for: eczema patients, children, those with formaldehyde allergy
Safer Alternatives
| Alternative | Safety Score |
|---|---|
| Sodium Benzoate | 8/10 |
| Potassium Sorbate | 8/10 |
How to Avoid Quaternium-15
- Read ingredient labels carefully for "Quaternium-15" or its chemical synonyms
- Choose products with third-party certifications (EWG Verified, Made Safe)
- Consider alternatives like Sodium Benzoate or Potassium Sorbate
- Check the EWG Skin Deep database for product ratings
- Look for "Quaternium-15-free" labels on product packaging
Frequently Asked Questions
Is Quaternium-15 safe for babies?
No, we recommend avoiding Quaternium-15 in products used on or around babies due to their developing systems.
What are the safest alternatives to Quaternium-15?
Safer alternatives include Sodium Benzoate (safety score: 8/10), Potassium Sorbate (safety score: 8/10).
Is Quaternium-15 banned in other countries?
Regulatory status: Not restricted by FDA; EU limits formaldehyde release
How do I know if my product contains Quaternium-15?
Check the full ingredient list on the product label. Quaternium-15 may also appear under different chemical names. Using apps like EWG Healthy Living or Think Dirty can help identify it.
Related Safety Guides
References
- Warshaw EM et al. (2007). Quaternium-15 contact allergy prevalence PMID: 16948428