Potassium hydroxide is a PH regulator, which can be used to regulate skin care products. In face creams, potassium hydroxide can also be used as a catalyst in the emulsifying process. Adding an appropriate amount of alkali can react with the acidic components in the base oil to generate hydrophilic surfactant, thus promoting the emulsification of the base oil and forming oil-in-water (O/W) emulsion, thus improving the emulsification effect and stability.

　　氢氧化钾其性质与烧碱相似。碱性强，有腐蚀性，过量的会腐蚀皮肤。然而，化妆品中碱的量也是严格按照不稳定系数法(USI)计算的。化妆品中添加的碱性成分在乳化过程中已经被中和，对人体没有影响，变成了成品中的有机盐等物质。

　　Potassium hydroxide is similar in nature to caustic soda. It is highly alkaline and corrosive, and can corrode the skin in excess. However, the amount of alkali in cosmetics is also calculated strictly according to the instability coefficient method (USI). The basic ingredients added in cosmetics have been neutralized in the emulsification process, which has no effect on the human body and become organic salts and other substances in the finished product.

　　提醒大家一下，氢氧化钾可以在我们的皮肤组织上燃烧作用，这可以溶解其中的蛋白质，形成碱性变性蛋白质。溶液或灰尘溅到我们的皮肤上，尤其是粘膜上，会产生软痂。溶液浓度越高，温度越高，对应的作用越强。

　　Just to remind you, potassium hydroxide burns on our skin tissue, which dissolves the proteins in it, forming alkaline denaturing proteins. Soft scabs can occur when solution or dust spills onto our skin, especially mucous membranes. The higher the concentration of solution, the higher the temperature, the stronger the corresponding effect.

　　溅到眼睛里不仅会损伤角膜，还会损伤眼睛的深层组织。因此在操作氢氧化钾时，我们应该穿上由结实的布、橡胶手套、袖子、围裙、胶鞋等劳动保护用品制成的工作服，并在手上涂上中性和疏水性的药膏。

　　Splashing into the eye can damage not only the cornea, but also the deeper tissues of the eye. Therefore, when handling potassium hydroxide, we should wear work clothes made of sturdy cloth, rubber gloves, sleeves, aprons, rubber shoes and other labor protection products, and apply neutral and hydrophobic ointment on our hands.

　　氢氧化钾属于强碱，但添加到洗面奶中的氢氧化钾是极少量的，在化妆品中浓度很小，主要用来调节产品的酸碱值，特别是对于皂基型洗面奶，这个原料是不可少的。一般情况下符合规定用量的氢氧化钾是不会对皮肤造成伤害的，只有浓度过高时才会对皮肤产生强烈的刺激感，而浓度过高的产品是不符合规定的，是无法通过质监部门的。http://www.jinhao360.com

　　Potassium hydroxide belongs to strong alkali, but the potassium hydroxide added to the cleansing milk is very small, in the concentration of cosmetics is very small, mainly used to adjust the ph value of the product, especially for soap based cleansing milk, this raw material is indispensable. In general, the amount of potassium hydroxide in accordance with the provisions will not cause harm to the skin, only when the concentration is too high will produce a strong sense of irritation to the skin, and the concentration of the product is not in accordance with the provisions, is unable to pass the quality supervision department.