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ISO 26603:2017WithdrawnPlastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of total chlorineInternational Standard · Published 2 Mar 2017 · ISO/TC 61/SC 12ISO 26603:2008WithdrawnPlastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of total chlorineInternational Standard · Published 11 Aug 2008 · ISO/TC 61/SC 12