What is sd-alcohol 39-C?

SD-Alcohol 39-C, also known as denatured alcohol, is a type of ethanol that has been modified with additives to make it unfit for human consumption. It is commonly used in cosmetic and personal care products as a solvent and astringent due to its ability to dissolve oils and other ingredients. The "39-C" designation indicates that it is a specific formulation of denatured alcohol, often used in formulations where a high evaporation rate and quick-drying properties are desired.