What is hydroxyl value?

Hydroxyl value is a measure of the quantity of hydroxyl groups per unit mass in a chemical compound, typically a polymer. It is expressed in milligrams of potassium hydroxide (KOH) per gram of sample, and is used to determine the degree of unsaturation or crosslinking present in a material. The hydroxyl value is an important characteristic of a material, as it can affect its reactivity, solubility, and chemical behavior. It is commonly used in the analysis of natural oils and fats, as well as in the production of resins, coatings, and adhesives.