What is the pH level of a neutral substance on the pH scale?

The pH scale ranges from 0 to 14, where 7 represents a neutral level, indicating that the substance is neither acidic nor alkaline. A pH below 7 signifies acidity, while a pH above 7 indicates alkalinity. A pH of 7 is significant because it is considered the point of balance; for instance, pure water has a pH of 7, which is often used as a reference point for classifying other substances in terms of acidity or basicity. Understanding pH is vital in esthetics because it helps to determine the compatibility of products with skin types and their effectiveness in treatments.