M9 salts

5X M9 salts contains:
 * 64 g Na2HPO4.7H2O
 * 15 g KH2PO4
 * 2.5 g NaCl
 * 5 g NH4Cl

dissolved in deionized water to a final volume of 1 L

Source
Adapted From:

J. Sambrook, D.W. Russell, Molecular Cloning: A Laboratory Manual (Cold Spring Harbor Laboratory Press, New York, ed. 3, 2001) pg. A2.2