What is the difference between ferrous chloride and iron chloride
Ferrous chloride and iron chloride refer to different compounds based on their chemical compositions and properties.
Ferrous chloride, also known as iron(II) chloride, has the chemical formula FeCl2. It is characterized by its greenish to yellowish appearance and is soluble in water, ethanol, and methanol. Ferrous chloride exists in various forms, such as the anhydrous form (FeCl2) and the tetrahydrate form (FeCl2·4H2O), which is a transparent blue-green monoclinic crystal. This compound is prone to oxidation in air, gradually turning into a basic ferric chloride.
On the other hand, iron chloride typically refers to iron(III) chloride, which has the chemical formula FeCl3. Unlike ferrous chloride, iron(III) chloride exhibits different chemical properties due to its higher oxidation state of iron. Iron(III) chloride is a brownish-yellow or black crystalline solid that is highly soluble in water and forms an acidic solution. It is also soluble in organic solvents such as ethanol and. Iron(III) chloride is widely used in various industrial applications, including water treatment, dyeing, and as a catalyst.
In summary, the key difference between ferrous chloride and iron chloride lies in their chemical compositions: ferrous chloride contains iron in its +2 oxidation state (Fe2+), whereas iron chloride contains iron in its +3 oxidation state (Fe3+). This difference results in distinct physical and chemical properties and, consequently, different applications.
| Formula | FeCl2·4H2O | Molecular Weight | 198.81 | CAS NO | 13478-10-9 |
| U.N-NO | 3260 | Class | 8 | H.S-NO | 2827399000 |
Character: It can soluble in water.
Chemical Parameters:
| NO. | Item | Standard Grade |
| 1 | Appearance | Blue-green crystal |
| 2 | FeCl2·4H2O | 99%min |
| 3 | Insolubles in water | 0.01%max |
| 4 | SO42- | 0.003%max |
| 5 | Fe3+ | 0.01%max |
| 6 | Cu | 0.005%max |
| 7 | Alkaline-earth metal | 0.1%max |
| 8 | As | 0.003%max |
| 9 | Zn | 0.008%max |
| 10 | Mn | 0.07%max |
| 11 | Pb | 0.005%max |
Ferrous chloride, also known as iron(II) chloride, has a wide range of application fields. Here are some of its main uses:
- Water treatment: It is used as a reducing agent and can help control algae and bacteria in water.
- Chemical synthesis: Due to its strong reducing properties, ferrous chloride is often used to convert ferric ions to ferrous ions in chemical reactions. It is also used as a catalyst in organic synthesis.
- Pharmaceuticals: It has certain applications in the pharmaceutical industry, although specific uses may vary.
- Dyes and pigments: Ferrous chloride is used as a mordant in dyeing fabrics and in the production of pigments.
- Metallurgy: It is used as a source of iron in the production of iron and steel.
- Other industrial applications: Ferrous chloride is also used in the manufacturing of other chemicals, as well as in the treatment of wastewater and as a component in ultra-high-pressure lubricants.
In summary, ferrous chloride plays a crucial role in various application fields due to its unique chemical properties and versatility.
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