Table 2.
Formulations with different chemical enhancers and respective concentrations used.
| Formulation Code | Enhancer | Concentration |
|---|---|---|
| CA1 | Citric acid | 1% |
| CA2 | Citric acid | 2.5% |
| CA3 | Oleic acid | 2.5% |
| CA4 | Oleic acid | 5% |
| CA5 | Isopropylmyristate | 5% |
| CA6 | Isopropylmyristate | 10% |
| CA7 | N-lauroyl sarcosine | 1% |
| CA8 | N-lauroyl sarcosine | 2% |
| CA9 | Tween-20 | 1% |
| CA10 | Tween-20 | 2% |
| CA11 | Transcutol | 10% |
| CA12 | Transcutol | 20% |
| CA13 | Dimethyl sulfoxide | 5% |
| CA14 | Dimethyl sulfoxide | 10% |
| CA15 | N-methylpyrrolidone | 5% |
| CA16 | N-methylpyrrolidone | 10% |