Iron III Bromide Molar Mass

Iron(III) bromide: A versatile salt with a variety of applications


Iron(III) bromide, also known as ferric bromide, is a salt of iron with the chemical formula FeBr3. It is an inorganic compound that is reddish-brown in color and has no odor. It is a crystalline solid and is soluble in water and ethanol.


Iron(III) bromide is a Lewis acid, which means that it can accept electron pairs. It is also a strong oxidizing agent and can react with other elements to form more oxidized compounds.


Iron(III) bromide has a variety of applications, including:

  • Catalysis: Anhydrous iron(III) bromide is an effective catalyst for the halogenation of aromatic compounds. This reaction is used to produce a variety of industrial chemicals, including pesticides, herbicides, and pharmaceuticals.
  • Textile dyeing and printing: Iron(III) bromide is used as a mordant in textile dyeing and printing. A mordant is a substance that helps to fix a dye to a fabric. Iron(III) bromide is particularly effective for mordanting wool and silk.
  • Photography: Iron(III) bromide is used in some photographic processes. It is also used as a catalyst in the production of photographic film and paper.
  • Analytical chemistry: Iron(III) bromide is used in analytical chemistry to precipitate proteins and other compounds.
  • Biotechnology: Iron(III) bromide is used in some biochemical applications, including protein purification and DNA and RNA isolation.


Iron(III) Bromide (FeBr3) Specification

CAS Number


Chemical Formula


Molecular Weight



dark brown powder

Density (g/cm3)


Melting Point



Soluble in water, ether and alcohol.


The molar mass of Iron III Bromide (FeBr3) is 295.56 g/mol. This means that 1 mole of FeBr3 has a mass of 295.56 grams.

Molar mass is a physical property of a substance that is defined as the mass of one mole of the substance. It is a useful property for calculating the mass of a substance, given its number of moles.

To calculate the mass of FeBr3, given its number of moles, use the following formula:

Mass of FeBr3 = (Molar mass of FeBr3) * (Number of moles of FeBr3)

For example, to calculate the mass of 0.5 moles of FeBr3, use the following formula:

Mass of FeBr3 = (295.56 g/mol) * (0.5 moles) = 147.78 grams

Molar mass is a fundamental property of matter and is used in a variety of scientific and engineering applications.

The molar mass of iron(III) bromide (FeBr3) is used in a number of biotechnology applications, including:

  • Protein purification: FeBr3 can be used to precipitate proteins from solution. This is a useful technique for purifying proteins from complex mixtures.
  • Enzyme assays: FeBr3 can be used to measure the activity of certain enzymes. For example, FeBr3 is used in the assay for alkaline phosphatase, an enzyme that is important for bone and kidney function.
  • DNA and RNA isolation: FeBr3 can be used to isolate DNA and RNA from cells and tissues. This is a common step in many molecular biology techniques.
  • Gene therapy: FeBr3 is used in some gene therapy vectors to deliver genes to cells. Gene therapy is a promising new approach to treating a variety of diseases.

Here are some specific examples of how the molar mass of FeBr3 is used in biotechnology applications:

  • Protein purification: FeBr3 is used to precipitate proteins from solution in the purification of immunoglobulin G (IgG), a type of antibody that is used to treat a variety of infections and autoimmune diseases.
  • Enzyme assays: FeBr3 is used to measure the activity of alkaline phosphatase in blood tests to diagnose and monitor liver disease.
  • DNA and RNA isolation: FeBr3 is used to isolate DNA from blood samples for genetic testing.
  • Gene therapy: FeBr3 is used in some gene therapy vectors to deliver the gene for cystic fibrosis transmembrane conductance regulator (CFTR) to the lungs of patients with cystic fibrosis.

The molar mass of FeBr3 is an important property that is used in a variety of biotechnology applications. It is a versatile compound that can be used to purify proteins, measure enzyme activity, isolate DNA and RNA, and deliver genes to cells.