For Research Use Only. Not for Use in Diagnostic Procedures. Buffer containing Tris (Tris(hydroxymethyl)aminomenthane (6.1 g/L), bovine Serum Albumin (BSA at 10 g/L) and 0.9 g/L Sodium Azide (as perservative). Can be used as buffer recommended by the USP and EP for the assay of heparin anti-IIa and anti-Xa activity verfied and validated in combination with BIOPHEN ANTI-IIa (2 Stages Heparin Assay) and BIOPHEN ANTI-Xa (2 Stages Heparin Assay) kits. USP = United States Pharmacopeia.EP = European Pharmacopeia. Please see important notification letter from the manufacturer regarding the use of this product. 4 x 20 mL. Dilution buffer for biological tests, recommended mainly for diluting purified proteins and enzymes. Can be used as "buffer A".