Store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
References
Small, D.L., et al.: J. Chem. Med., 22, 1014 (1979), Guentert, T.W., et al.: Eur. J. Drug Metab. Pharmacokinet., 7, 31 (1982), Rakhir, A., et al.: J. Pharmacokinet. Biopharm., 12, 1 (1984), Christie, D.J., et al.: J. Lab. Clin. Med., 112, 92 (1988),