Vacin & Went Microelements (100X) is supplied by HiMedia. It is available in the form of a red to brown, homogeneous, free flowing powder with a pH in the range of 4.1 to 5.1. 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)
Ferric tartarate (26.30)
Vacin & Went microelements (100X) powder has been specially formulated for the in vitro cultivation of orchid cultures. The powder contains inorganic microelement and iron source. The vial contains 3.14 grams of dehydrated microelements that is sufficient for making 100 litres of complete medium.