
Magnesium Sulfate 2.25% (BOD Nutrient) by Exaxol, catalog number M5012-500, is a 2.25% w/v (22.5 g MgSO4·7H2O/L) aqueous magnesium sulfate solution, supplied ready to use. Available in 500 mL from MBP, a registered vendor to many research institutes across the USA.