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.

　　氫氧化鉀其性質與燒堿相似。堿性強，有腐蝕性，過量的會腐蝕皮膚。然而，化妝品中堿的量也是嚴格按照不穩定系數法(USI)計算的?；瘖y品中添加的堿性成分在乳化過程中已經被中和，對人體沒有影響，變成了成品中的有機鹽等物質。

　　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，氫氧化鉀可以在我們的皮膚組織上燃燒作用，這可以溶解其中的蛋白質，形成堿性變性蛋白質。溶液或灰塵濺到我們的皮膚上，尤其是粘膜上，會產生軟痂。溶液濃度越高，溫度越高，對應的作用越強。

　　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.

　　濺到眼睛里不僅會損傷角膜，還會損傷眼睛的深層組織。因此在操作氫氧化鉀時，我們應該穿上由結實的布、橡膠手套、袖子、圍裙、膠鞋等勞動保護用品制成的工作服，并在手上涂上中性和疏水性的藥膏。

　　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.

　　氫氧化鉀屬于強堿，但添加到洗面奶中的氫氧化鉀是極少量的，在化妝品中濃度很小，主要用來調節產品的酸堿值，特別是對于皂基型洗面奶，這個原料是不可少的。一般情況下符合規定用量的氫氧化鉀是不會對皮膚造成傷害的，只有濃度過高時才會對皮膚產生強烈的刺激感，而濃度過高的產品是不符合規定的，是無法通過質監部門的。http://www.shrisa.cn

　　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.