Magnesium Sulphate Heptahydrate MSN: yooweewang@ hotmail.com Skype: yooweewang it also be called epson Salt , sulfate bitter, bitter salt, epsomite MgSO4.7H2O HS Code: 28332100 Appearance: White crystal powder MgSO4.7H2O: 99.5% min Ferrous ( Fe) : 0.001% max Chloride( Cl) : 0.004% max Heavy metal( Pb) : 0.001% max Arsenic ( As) : 0.0002% max PH: 6-8 Packing: in pp bag of 25kg net each, with PE liner or On Pallets Quantity: 25mt/ 20FCL Application: Fertilizer manufacturing, agriculture In thin cotton, silk of dyeing industry. Extender for leather, raw materials paper pulp; and textile industry etc.