Ferrous sulfate / ferrous sulfate heptahydrate / Green alum / iron alum

English Name: ferrous sulfate heptahydrate; Iron(II) sulfate heptahydrate

Other names: Alum;  Ferric sulfate (II) heptahydrate

CAS No.: 7782-63-0

FeSO4.7H2O=278.01

Grade: ar

Content: 99.0 ~ 101.0%

Manganese: ≤ 0.05%

Copper: ≤ 0.002%

Zinc: ≤ 0.005%

Arsenic: ≤ 0.0002%

Lead: ≤ 0.002%

Water insoluble matter: ≤ 0.005%

Ammonia non sediment (calculated by sulfate): ≤ 0.05%

High speed railway: ≤ 0.02%

Total nitrogen: ≤ 0.001%

Chloride: ≤ 0.001%

Phosphate: ≤ 0.0005%

Physicochemical properties (the following information is for reference only): blue-green monoclinic crystal or particle. Odorless. Weathered in dry air. The surface is oxidized to brown basic ferric sulfate in moist air. It becomes tetrahydrate at 56.6 ℃ and monohydrate at 65 ℃. Soluble in water, almost insoluble in ethanol. Its aqueous solution oxidizes slowly in the air when it is cold and rapidly when it is hot. The addition of alkali or dew can accelerate its oxidation. The relative density (D15) is 1.897.

Usage: This product is only for scientific research, and cannot be used for other purposes. (the following information is for reference only) chromatographic reagent. Platinum, selenium, nitrite and nitrate were determined by drop analysis.

Save: RT, away from light