EDTA, Concentrate This EDTA solution is specifically formulated for use in our Heat Induced Epitope Retrieval (HIER) method. Supplied as a 100 mL aliquot of 20X concentrate or 1L ready-to-use format. Reagent Type: Antigen Retrieval Reagent Product Size: 100 mL Shipping Condition: Wet Ice Regulatory Statement: For In Vitro Diagnostic Use. Store in refrigerator (2–8°C).