ICH Revised Guideline on Residual Solvents

The International Conference for Harmonization (ICH) has released for adoption a revised guideline entitled ICH Q3C(R8) Guideline on Impurities: Guideline for Residual Solvents. The document was revised to include the permitted daily exposure levels for three solvents — 2-methyltetrahydrofuran, cyclopentyl methyl ether, and tertiary butyl alcohol. Additionally, an introductory training presentation on the document has also been developed by ICH’s Maintenance Expert Working Group.

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