Ultrasol® micro Rexene® FeD6 is a stable liquid source of iron chelate-DTPA developed for the prevention of iron deficiency in a wide range of applications. It is recommended for recirculated nutrient solutions and is free of sodium (Na), chloride (Cl) and sulfate (SO₄). Typical iron (Fe) content is 6.1% as high quality, fully chelated DTPA. It has a physical appearance of a clear reddish-brown liquid, with a density of 1.30 g/ml and a crystallization point below -10°C. It is miscible with water at any desired ratio and has a pH stability of 1.5 to 7.5.