# Will iron(III) sodium EDTA release its nitrogen into a water medium and become bioavailable to aquatic plants?

I am wanting to create an N-free Hoagland's solution and have discovered a recipe that includes sodium ferric ethylenediaminetetraacetate salt $$(\ce{C10H12FeN2NaO8}).$$ Will the nitrogen in EDTA release into the water and become bioavailable to aquatic plants?

• In what form would you consider the nitrogen to be available to plants - nitrates, nitrites, free ammonia, glycine? May 4 at 12:22
• I will be measuring both nitrate and nitrite in the water, so those, I guess. May 5 at 11:21
• Then I think you are in the clear. There seems little chance that the nitrogens from EDTA will end up as nitrates or nitrites - see the reference in my answer below. May 5 at 12:03