What is the pH range of sodium hydroxide?

The pH range of sodium hydroxide is indeed 12.5 to 13.5, which classifies it as a highly alkaline (or basic) substance. Sodium hydroxide, commonly known as lye or caustic soda, is a strong base that is frequently used in various industries, including cosmetics and personal care. Its high pH indicates its ability to effectively neutralize acids and interact with various chemical processes.

Understanding the pH of sodium hydroxide is essential for professionals in cosmetology since products containing this substance can have significant effects on skin and hair treatments. A pH that is too high can cause irritation; hence, knowing and managing the pH level is crucial for maintaining safety and effectiveness in application. This knowledge assists cosmetologists in providing safe services to clients, especially when using products that can alter the pH balance of the skin or hair.