强硷性物质，有皮肤刺激性，用以调整 pH 值，并常加入植物酸中进行皂化程序，以制成肥皂，常用于清洁产品中，除此之外，由于其会破坏毛干的最外层表皮(cuticle of hair shaft)，也常用于除毛用品中。
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Potassium Hydroxide is a harmful ingredient that is found not just in skin care products but in everything from leather tanners and drain cleaners. Also known as lye, Potassium Hydroxide is extremely corrosive and can be found in soaps and shampoos to control the pH of the skin. The trouble is that Potassium Hydroxide is known to cause severe burns and pain in some cases as well as blindness should it get into the eyes.
Read more: http://www.articlesnatch.com/Article/Most-Harmful-Ingredients-In-Your-Skin-Care-Products/953729#ixzz1wFZO8r2y
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