Individual standards and custom mixtures containing methanol, ethanol, acetone, acetonitrile, toluene, and other commonly monitored solvents are now available for USP and ICH Q3C testing by GC and GC-MS.
Lab Fact:
ICH Q3C classifies residual solvents according to toxicity. Class 1 solvents are restricted so tightly that laboratories require reliable reference standards to confirm compliance with established limits.