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Milady Standard Esthetics 12th Edition Practice Test

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The antiseptic and solvent used in perfumes, lotions, and astringents, commonly denoted as SD alcohol, is:
Correct Answer:
Alcohol
Explanation:
SD alcohol means specially denatured alcohol, which is a form of ethanol that’s been treated with denaturants to make it undrinkable while keeping its solvent and antiseptic properties. In perfumes, lotions, and astringents, this denatured alcohol acts as the main solvent, helping dissolve fragrances and active ingredients and then evaporating quickly from the skin. Because the term refers to the denatured form of alcohol, the label you’d see is simply Alcohol. Water isn’t an antiseptic and isn’t the primary solvent in these formulas; while ethanol is the base chemical, the industry uses the denatured form, collectively called alcohol. Isopropyl alcohol is a different type of solvent with its own uses and isn’t the standard SD alcohol in cosmetic products.

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