what is a residual solvent
Residual Solvent Slide 1: 2 What is Residual Solvent âResidual solvents in pharmaceutical are defined as organic volatile chemicals that are used or produced in the manufacture of drug substances or Excipients, or in the preparation of drug productsâ. Residual Solvent Classes Other Residual Solvents The residual solvents listed in Table 4 may also be of interest manufactures of drug substances, excipients, or drug products, However, no adequate toxicology data on which to base a PDE was found.