Table 3.
Optimization of mosquito repellent cream.
| Parameters | Prototype 1 | Prototype 2 | Prototype 3 | Prototype 4 | Prototype 5 | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Results | Changes | Results | Changes | Results | Changes | Results | Changes | Results | Changes | |
| Elegancy | Poor | — | Acceptable | — | Acceptable | — | Good | — | Good | — |
| Emulsification | Acceptable | — | Acceptable | Change emulsifier | Good | — | Good | — | Good | — |
| pH | 5.5 | (+) KOH | 6.1 | (+) KOH | 6.7 | — | 6.7 | — | 6.7 | — |
| Consistency | ||||||||||
| Softness@ | Very soft/not-acceptable | (+) Cetostearyl alcohol | Hard/not-acceptable | (−) Cetostearyl alcohol (+) Stearyl and cetyl alcohol | Very soft/not-acceptable | (+) Stearic acid | Soft/acceptable | (+) Stearic acid | Soft/acceptable | — |
| Greasiness@ | Acceptable | — | Acceptable | (−) PG | Acceptable | (−) PG | Acceptable | — | Non-greasy/Acceptable | — |
| Stickiness@ | Acceptable | — | Sticky/not-acceptable | (−) Cetostearyl alcohol | Sticky/not-acceptable | — | Sticky/not-acceptable | (−) PG | Non-sticky/Acceptable | — |
@Acceptable/not-acceptable, PG: propylene glycol, and KOH: potassium hydroxide.