scope:

This International Standard specifies a method for the determination of the contents of unsaponifiable, unsaponified and unsaponified saponifiable matter in commercial soaps, excluding compound products. This method is applicable to the determination of the contents of products, other than free fatty acids, which are soluble in hexane or light petroleum (unsaponifiable + unsaponified matter), and which can be saponified (unsaponified saponifiable matter). The method is not applicable to soaps enriched with sterols or long chain alcohols, nor to soaps containing perfume.