Which formulation penetrates the skin the fastest?

Emulsifiable liquids penetrate the skin the fastest due to their unique formulation which combines both water and oil-based components into a stable mixture. This allows for better solubility and absorption by the skin compared to other forms. The smaller particle size of emulsifiable liquids enhances their ability to diffuse through the outer layer of the skin, making them more effective for rapid absorption.

Granular formulations typically have larger particles, which can impede absorption, while wettable powders and suspensions may contain additional ingredients that further slow penetration. This combination of factors contributes to emulsifiable liquids being the most efficient choice for quick skin penetration among the options provided.