English Name: Ferrous Sulfate Heptahydrate or Iron(II) Sulfate Heptahydrate
Chemical Formula: FeSO₄·7H₂O
Molecular Weight: 278.01
CAS No.: 7782 - 63 - 0
Synonyms: Green Vitriol, Copperas, etc.
Physical and Chemical Properties
Appearance: Light blue - green monoclinic crystals.
Density: 1.898 g/cm³
Melting Point: 64°C (losing crystal water)
Solubility: Soluble in water and glycerol, insoluble in ethanol.
Stability: It is prone to efflorescence in dry air and is easily oxidized to yellow - brown basic ferric sulfate in humid air. It will decompose at high temperatures, producing ferric oxide, sulfur dioxide, and sulfur trioxide.
pH Value: The pH of a 5% aqueous solution is 3.0 - 4.0.
Water Treatment: Used for the flocculation and purification of water, removing phosphates in urban and industrial sewage to prevent eutrophication of water bodies.
Medical Field: Used to treat iron - deficiency anemia, and can also be used as a food iron fortifier. It can also be used as a local astringent for chronic blood - losing conditions.
Agriculture: It can adjust the soil pH value, promote chlorophyll formation, and prevent yellowing of flowers and trees caused by iron deficiency. It can also be used as a pesticide to control wheat smut, etc., and can be used as a fertilizer to remove moss and lichen on tree trunks.
Industrial Applications: Used in the manufacture of iron salts, inks, magnetic iron oxide, iron - based catalyst, etc. It can also be used as a mordant, tanning agent, wood preservative, etc.
Packaging and Storage
Packaging: Usually packed in woven bags with plastic - lined inner bags, 25 kg or 50 kg per bag. There are also other packaging specifications according to customer needs.
Storage: Should be stored in a cool and ventilated warehouse, away from fire sources and heat sources, and protected from direct sunlight. The packaging must be sealed to prevent moisture. It should be stored separately from oxidants and alkalis, and should not be stored together.
Safety Precautions: It is irritating to the human respiratory tract, and inhalation may cause coughing and shortness of breath. It is also irritating to the eyes, skin, and mucous membranes, so protection should be paid attention to when using it.