This International Standard specifies a method for the simultaneous determination of the total alkali and total fat contents of commercial soaps, excluding compositions. The method for determining the total alkali content is not applicable to colored soaps if the color interferes with the assessment of the color change of the methyl orange.
NBN T 63-107-1980 history
1980NBN T 63-107-1980 Analysis of soaps - Determination of total alkali content and total fatty matter content