Good afternoon. 
We ask you to inform us about the possibility of supplying Iron vitriol(FeSO4*7H2O) to our address in the amount of 27 tons on the terms of the Alamedin jelly railway station (code 716908).
-Appearance- crystals green-blue
-The mass fraction of iron sulfide is not less than 53%
-The mass fraction of free sulfuric acid is not more than 0.3%