Knudson C Orchid Microelements (100X) is supplied by HiMedia. It is available in the form of a yellow to greenish yellow, homogenous, free flowing powder with a pH in the range of 3.4 to 4.4. 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:

Manganese sulphate.H2O (5.68)

Ferrous sulphate.7H2O (25.00)

Knudson C Orchid microelements (100X) powder has been specially formulated for the in vitro culture of orchids. The powder contains inorganic microelement and iron source. The vial contains 1.87 grams of dehydrated microelements that is sufficient for making 100 litres of complete medium.