Quaternium-91
Quaternium-91 is a cosmetic ingredient used as a hair conditioning agent. It is used in 141 products in our dataset. It is regulated in the EU (listed in a Cosmetics Regulation annex).
| INCI name | QUATERNIUM-91 |
| Function | HAIR CONDITIONING |
| Prevalence | 141 products (0.15% of dataset) |
| Most used in | Haircare |
| EU status | Restricted (annex ) |
| Monthly searches | 20 |
Used in
Conditioners 41.1%Hair Masks 19.9%Leave-in Conditioners 8.5%Leave-in Treatments 8.5%Shampoos 7.1%Heat Protectants 3.5%
Frequently asked
- What does Quaternium-91 do in skincare?
- Quaternium-91 functions as a hair conditioning agent in cosmetic formulas.
- Is Quaternium-91 allowed in cosmetics?
- Yes, but it is regulated in the EU — it appears in a Cosmetics Regulation annex with usage conditions.
- What products contain Quaternium-91?
- It is most commonly found in Haircare products, especially conditioners (41.1% of its uses).
Manufacturers with experience using Quaternium-91
Match with vetted US contract manufacturers that have hands-on experience formulating with this ingredient.