This product is not available for purchase in North America or Nordic and Baltic Countries. 5-BUFFER USP/Ph.Eur. Tris-NaCI-EDTA-PEG-6000 Buffer salts, pH 8.4 for the quality control of the anti-FXa and anti-FIIa activity of UFH in compliance with European Pharmacopoeia or with US Pharmacopoeia.