Gamborg B5 Macroelements is supplied by HiMedia. It is available in the form of a white to off-white, homogenous, free flowing powder with a pH in the range of 4.4 to 5.4. 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:

Potassium nitrate (2500.00)

Ammonium sulphate (134.00)

Calcium chloride.2H2O (150.00)

Magnesium sulphate (122.09)

Sodium phosphate monobasic (130.42)

Gamborg B5 medium macroelements powder has been specially formulated for plant cell, tissue and organ cultures. Potassium nitrate serves as the nitrate source. Ammonium sulphate and magnesium sulphate serves as the sources of sulphate.