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Residual solvents in pharmaceutical products are defined as organic volatile compounds that are used or produced in the manufacturing of drug substances or excipients, or in the preparation of drug products, or from packaging and storage. Residual solvents are sometimes crucial in the synthesis of drug substances. Oftentimes, residual solvents are necessary to ameliorate the quality of drug substances or excipients. However, they are pitfalls and have no therapeutic value. Therefore, if the resi