Ferrous chloride tetrahydrate
[CAS# 13478-10-9]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Metal halides and halides >> Metal chlorides and salts
• Name: Ferrous chloride tetrahydrate
• Synonyms: Iron(II) chloride tetrahydrate
• Molecular Formula: FeCl₂.4(H₂O)
• Molecular Weight: 198.81
• CAS Registry Number: 13478-10-9
• EC Number: 603-870-5
• SMILES: O.[Cl-].[Cl-].[Fe+2]

Properties

• Density: 1.93
• Melting point: 670 °C
• Boiling point: 1026 °C
• Water solubility: soluble

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Risk Statements: H302-H315-H318
• Safety Statements: P280-P301+P312+P330-P305+P351+P338+P310

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Skin corrosion	Skin Corr.	1B	H314
Serious eye damage	Eye Dam.	1	H318
Substances or mixtures corrosive to metals	Met. Corr.	1	H290
Acute toxicity	Acute Tox.	4	H312
Skin irritation	Skin Irrit.	2	H315
Acute toxicity	Acute Tox.	4	H332

• Transport Information: UN 3260

Discovery and Applications

Ferrous chloride tetrahydrate, with the chemical formula FeCl₂·4H₂O, is a notable chemical compound in both industrial and laboratory settings due to its properties and versatility. This substance, a hydrated form of ferrous chloride, is recognized for its role in various chemical processes and applications.

The discovery of ferrous chloride tetrahydrate is rooted in the broader study of ferrous chloride (FeCl₂), which has been known since the early days of inorganic chemistry. Ferrous chloride itself was first identified in the 19th century, and its hydrated form, FeCl₂·4H₂O, was later characterized as researchers delved into the study of hydrated salts. The tetrahydrate form is commonly obtained by dissolving ferrous chloride in water, leading to the formation of this specific hydrate.

Ferrous chloride tetrahydrate finds significant use in several industrial and chemical processes. One of its primary applications is in the treatment of wastewater. It serves as a coagulant and flocculant in water purification systems, where it helps in removing suspended particles and impurities from water. The compound reacts with contaminants to form flocs, which can then be easily removed, thereby improving water quality.

In addition to its role in wastewater treatment, ferrous chloride tetrahydrate is used in the synthesis of other chemical compounds. It acts as a reducing agent in various chemical reactions, facilitating the reduction of other substances. This property is utilized in the production of different chemicals and materials where a controlled reduction process is required.

The compound is also used in the preparation of iron-based catalysts. Iron catalysts play a crucial role in industrial processes such as the Haber-Bosch process for ammonia synthesis. Ferrous chloride tetrahydrate can be employed in the production of these catalysts, contributing to various chemical manufacturing processes.

In laboratory settings, ferrous chloride tetrahydrate is used as a reagent in various chemical analyses and experiments. It is employed in qualitative analysis to test for the presence of certain ions and compounds. Its ability to form colored complexes with different substances makes it a useful tool in analytical chemistry.

Handling ferrous chloride tetrahydrate requires attention to safety due to its corrosive nature. Proper storage in a cool, dry place and the use of personal protective equipment are essential to prevent exposure and ensure safe handling. The compound should be kept away from moisture and acids, as it can react to release hydrogen chloride gas.

Research continues to explore new applications and improvements in the use of ferrous chloride tetrahydrate. Advances in environmental technology and chemical synthesis are likely to reveal additional uses and optimize the properties of this versatile compound.

In summary, ferrous chloride tetrahydrate is an important chemical compound with a range of applications in wastewater treatment, chemical synthesis, and laboratory analysis. Its discovery and development have made significant contributions to industrial and scientific processes, and ongoing research holds promise for expanding its uses further.

References

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