Heller Macroelements is supplied by HiMedia. It is available in the form of a white to off-white, homogeneous, free flowing powder with a pH in the range of 4.3 to 5.3. Since this product is extremely hygroscopic, it is advisable to store it at 2-8C, in air tight containers. The composition (mg/ml) is as follows:
Calcium chloride.2H2O (75.00)
Magnesium sulphate (17.09)
Sodium phosphate monobasic (108.68)
Potassium chloride (750.00)
Sodium nitrate (600.00)
Heller macroelements has been specially formulated for plant cell, tissue and organ cultures. Sodium nitrate serves as the source of nitrate.