Sterilization Techniques for Parenteral Packaging Components

Selecting the right sterilization method for elastomeric parenteral packaging components is not a one-size-fits-all decision — it depends on compound chemistry, packaging format, fill-finish environment, and an increasingly complex regulatory and supply landscape in which ethylene oxide is under environmental scrutiny and cobalt-60 sources for gamma irradiation are becoming scarce. This on-demand webinar provides a systematic technical review of all sterilization techniques applicable to rubber closures, plungers, needle shields, and tip caps used in injectable drug packaging. Traditional methods covered include steam autoclave (30 min at 121°C; no measurable chemical effect but moisture management critical for lyophilization applications), gamma irradiation (10–40 kGy; high penetrability for bulk pallet sterilization; compound-dependent effects on fragmentation, hardness, and gliding behavior), and ethylene oxide (limited to isoprene and SBR needle shields and tip caps with high EtO-permeability compounds; not used on halobutyls due to long quarantine times). The webinar then presents experimental case study data on two emerging alternatives: chlorine dioxide (ClO₂) sterilization — tested across FM457 bromobutyl (coated and uncoated) and FM30 SBR at standard and 20x doses, assessed per USP <381> and Ph.Eur. 3.2.9 for functional and chemical compliance, with results showing equal or superior performance compared to gamma and EtO; and X-ray sterilization — shown to produce similar physical and functional effects to gamma on halobutyl compounds, with superior dose uniformity ratio (DUR) and the operational advantage of electricity-based generation without radioactive cobalt-60 dependence.