scope:

This part of ISO 4629 specifies a titrimetric method fordetermining the hydroxyl value of resins, binders for paints andvarnishes, primary alcohols, glycols and fats. Whether it can beapplied for hydro carboxylic acids, phenolic hydroxyl groups,polyols such as trimethyl propane and substances containingaromatic groups have been activated for Friedel-Crafts acylationshall be decided on case-to-case basis. Under the right conditions,the method is also applicable for determining the hydroxyl value ofcastor oil and its derivatives.