Reference number
ISO 673:1981
ISO 673:1981
© ISO 2024
International Standard
ISO 673:1981
Soaps — Determination of content of ethanol-insoluble matter
Edition 2
1981-06
1981-06
ISO 673:1981
4838
Published
(Edition 2, 1981)
This publication was last reviewed and confirmed in 2022.
Therefore this version remains current.
Abstract
The soap is dissolved in ethanol, filtrated and the undissolved residue is weighed. The constituents not dissolved correspond to the additives and foreign matter, of low solubility or insolubility in 95 % (V/V) ethanol, added to soaps and also to substances in all soap formulations, such as alkali carbonates and chlorides, borates, perborates, suphates, silicates, phosphates etc. It also may consist of organic substances like starches, dextrins, caseins, sugars, cellulose derivatives, alginates, etc.