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This presentation summarizes a recent study conducted at Alfred University that examined the corrosion of glass vials using a modified version of the hydrolytic resistance test. Vials made from converted glass tubing were filled with increasing incremental volumes of WFI and then autoclaved. The recovered liquid was analyzed for shifts in pH and the extractables were measured using ICP-OES. The results support the hypothesis that the heel region is a primary contributor to corrosion of glass vials made from converted tubing.