Adenosine Triphosphate, Disodium Salt (ATP-2Na)

UV Spectral Analysis: , Ratios at pH 7.5 , E260nm (15.4 ± 0.5) x 10e3, A340/A260 (0.80 ± 0.03) , A280/A260 (0.15 ± 0.02) , Sodium: 9.0 ± 2.0% by atomic absorption spectrophotometry, Water: < 12% by Karl Fischer, Contaminants: AMP + ADP < 1.0%, Application: Suitable for use as a calibrator or control serum. Storage and Stability: Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. ADP-Solution is stable over a broad range of pH 2-13.