Ferrous sulfate heptahydrate

CAS Number
7782-63-0
EC Number
231-753-5

What is Ferrous sulfate heptahydrate?

Ferrous sulfate heptahydrate (CAS 7782-63-0), also known as green vitriol or iron vitriol, is a hydrated iron(II) salt.

Where is Ferrous sulfate heptahydrate used?

  • Water treatment: flocculant that removes phosphates
  • Agriculture: corrects iron-deficiency chlorosis in crops and acts as a soil amendment
  • Moss and weed control: registered active ingredient for commercial landscaping
  • Pharmaceuticals and nutraceuticals: bioavailable iron source in iron-deficiency supplements and fortified formulations for human and animal health
  • Mining: catalyst precursor in hydrometallurgical leaching operations
  • It also acts as a reducing agent in the chromate treatment of process water and industrial effluent streams.

Good to know: Feed and pharma grades require documented purity specifications to ensure compliance with international safety and quality standards.

Commercial specifications

  • Bulk supply in 25 kg bags or bulk totes

Other Names (Synonyms)

iron(II) sulfate heptahydrate|iron vitriol|green vitriol|ferrous sulfate hydrate|copperas|Iron(2+) sulfate heptahydrate|Iron sulfate heptahydrate|Melanterite mineral

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What are the physical properties of Ferrous sulfate heptahydrate?

Melting Point 64 °C
Density 1.897 g/cm³
Appearance Ferrous sulfate is a greenish or yellowish solid in fine or lumpy crystals.
Color Slightly greenish to blue
Odor pale bluish-grn. cryst. or gran., odorless
Form Solution
Water Solubility 25.6 g/100 mL (20 ºC)
Vapor Pressure 14.6 mm Hg ( 25 °C)
pH 3.0-4.0 (25℃, 50mg/mL in H2O)
Log P -1.031 (est)

How is Ferrous sulfate heptahydrate classified and handled safely? Learn More

Warning
GHS07· Irritant

Hazard Statements

H302 Harmful if swallowed
H315 Causes skin irritation
H319 Causes serious eye irritation
H402 Harmful to aquatic life

Precautionary Statements

P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.

Which trade and regulatory codes apply to Ferrous sulfate heptahydrate?

HS Code 28332950
UN Number 3077
Storage Class 11 - Combustible Solids
WGK (Germany) 1
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