ISO 23649:2025

Current Revision
Chemicals for the leather tanning industry - Determination of cyclosiloxanes

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ISO 23649:2025

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.

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