Used in leukocyte alkaline phosphatase phosphatase stain. - Dimethyl Formamide. References are Williams, W.J., Beutler, E., Erslev, A.J. and Rundles, R.W., Hematology, 2nd ed., McGraw-Hill, NY, C. 1977, p 1628-1629, Kaplow, L.S., AM. J. Clin. Pathol., 39:439, 1693, and Kaplow, L.S. and Burstone, M.S. Nature, 200:690, 1963