ISO 1067

ISO 1067 - Analysis of soaps - Determination of unsaponifiable, unsaponified and unsaponified saponifiable matter

The ISO 1067 standard specifies a method for the determination of unsaponifiable, unsaponifiable and saponifiable contents. This method within the scope of the standard is valid for determining the contents of products that are soluble in hexane or light petroleum (non-saponifiable + non-saponifiable) and saponifiable (non-saponifiable-saponifiable matter) products, other than free fatty acids. The method does not apply to soaps enriched with sterols or long-chain alcohols, or to soaps containing perfume.

The principle of the test method is extraction of the substance dissolved in hexane and titration of free fatty acids separated by potassium hydroxide solution. The result is the saponification of the products dissolved in hexane neutralized in this way and the extraction of the unsaponifiable matter with hexane.