| Preservative system for preservative efficacy test | Preservative system for home-use test | ||||
Ingredient (% (w/v)) | 1 | 2 | 3 | 4 | 5 | 6 |
C16:1Δ6 | - | 0.1 | - | 0.5 | - | - |
Oleic acid | - | - | - | - | - | 0.5 |
Ethylparaben | - | - | 0.05 | - | 0.1 | 0.1 |
Propylparaben | - | - | 0.05 | 0.1 | 0.1 | 0.1 |