= Lyophilization of Parenteral (7/93) by the Food and Drug Administration
{c}
{title2=1993}
https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/inspection-guides/lyophilization-parenteral-793
Historical FDA inspection guide dated7/93. Introduction and Glossary distinguish freezing, primary drying by sublimation, and secondary drying by desorption. Cited for phase-change definitions and process-stage terminology. The dated guide is not a statement of current regulatory requirements.
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