ISO 23649:2025

Chemicals for the leather tanning industry — Determination of cyclosiloxanes

This document specifies a method for determining the total content of the following cyclosiloxanes in chemicals for the leather tanning industry:

—???? octamethylcyclotetrasiloxane (D4);

—???? decamethylcyclopentasiloxane (D5);

—???? dodecamethylcyclohexasiloxane (D6);

This method requires the use of gas chromatography (GC) equipped with a single quadrupole mass spectrometer (MS) to identify and quantify the cyclosiloxanes.

Edition	2025
Published Date	2025
Published By	International Standardization Organisation
Page Count	9