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Leachables Studies

ExtLe Solutions Limited designs and manages Leachables Studies that are individually tailored for clients products.

Studies are designed to utilise storage conditions, time points and analytical methodologies, fully aligned to the current regulatory expectations provided in USP <1664> (& USP <1664.1> for OINDPs). 


Analytical methods are developed and validated by our CRO partners, to ensure leachables are detectable at levels equivalent to relevant safety thresholds. Methods can be specific for named leachables, or can be developed to be more general and 'screening' in nature for the determination of  

  • Volatile Leachables  

  • Semi Volatile Leachables  

  • Non Volatile Leachables  

  • Elemental Leachables aligned to the guidance provided by ICH Q3D

Where any leachable is observed above a pre-agreed action threshold (defined from the AET, which in turn has been defined from the SCT / TTC / PDE), a full safety assessment will be performed by a qualified toxicologist.


An interim leachables report is produced at each time point, including trending of observable leachables levels, with a final version generated at the end of the study.

Click on the button below to arrange an initial no obligation discussion of your requirements.

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