The Avidin, HRP conjugate (Cat. No. 434423) is covered under our general 1-year warranty and is guaranteed to be fully functional for 12 months from the date of shipment, if stored as recommended. Please see section 8.1 of our Terms & Conditions of Sale (https://www.thermofisher.com/content/dam/LifeTech/Documents/PDFs/Terms-and-Conditions-of-Sale.pdf).
Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.