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EDDHA 6% Chelated Iron EDDHSA 6% Chelated Iron highly pure dust free fully water soluble. Gives a strong apical zone, free of chlorosis Iron 100% chelated and fully available up to a pH of 9 Developed for fertigation in open field and greenhouses. Also suitable for soil injection PRODUCT CHARACTERISTIC Free of Ammonium•Dark red brown microgranules Dust free•Easy to handle, fully soluble Always pre-dissolve at 10 grams per liter before use. In any case do not exceed 50 grams per liter. Hydroponic nutrient solutions, iron may be run at levels of between 0.5-6 PPM. The actual requirement for iron is dependent on several factors such as plant species, growing medium, and growing conditions including temperature and plant growth rate. EDDHA & EDDHSA chelate with 6% iron chelate of which has 4.8 is ortho-ortho. This simply means that giving 4.8 stable iron chelate. This does not mean that the remaining 1.2 is not available to the plant at all, however, this will precipitate quickly.