Appearance: Yellow green microgranular powder PH(10g/L 25â?? ): 3.8-6.0 Water solubility: About 90g / l (20â??), about 120g / l (30â??), about 300g / l (70â??) Cas no.: 15708 - 41 - 5 Chelated Fe: 13 % (+/- 0.5) as Fe Characteristics: dust-free product, easily and rapidly soluble in water because of its porous, compatible with most water-soluble fertilizers, also can be used as Deodorant in photographic processing; Catalyst in industry