Analysis Instruments

KBr (Potassium Bromide) powder is a chemical compound commonly used in various applications such as infrared spectroscopy, chemical synthesis, and pharmaceutical formulations. Here's a detailed look at the specifications and common uses of KBr powder:

1. Chemical Formula:

   • KBr (Potassium Bromide)

2. Appearance:

   • White, crystalline powder.

3. Purity:

   • Typically, KBr powder is available in various purities depending on the application:
     • Analytical Grade: ≥ 99.9% purity for laboratory use, especially in IR spectroscopy.
     • Reagent Grade: Suitable for general laboratory and chemical applications.
     • Pharmaceutical Grade: Meets the requirements for use in pharmaceutical formulations.

4. Solubility:

   • Soluble in water: KBr dissolves readily in water.
   • Insoluble in organic solvents.

5. Molecular Weight:

   • Approximately 119.00 g/mol.

6. Density:

   • Around 2.75 g/cm³ at 20°C.

7. Melting Point:

   • Approximately 734°C (1353°F).

8. Boiling Point:

   • Around 1,434°C (2,613°F).

9. pH (Aqueous solution):

   • Neutral, typically around 7 in water.

10. Hygroscopicity:

    • Hygroscopic: KBr powder can absorb moisture from the air, which may affect its purity and quality. It should be stored in airtight containers and kept in a dry environment.

1. Infrared Spectroscopy (IR Spectroscopy):

   • KBr powder is widely used in IR spectroscopy to prepare KBr pellets for solid sample analysis. The sample is mixed with KBr powder, which is then pressed into a pellet. The resulting pellet is transparent to infrared light and does not interfere with the measurement.
   • KBr powder is also used in the preparation of windows for FTIR (Fourier Transform Infrared) spectroscopy.

2. Chemical Synthesis:

   • KBr is involved in various chemical reactions, particularly in the preparation of bromine-containing compounds.
   • It's used as a halogenating agent in organic chemistry.

3. Pharmaceutical Formulations:

   • Potassium Bromide has been used in the past as a sedative and anticonvulsant in the treatment of certain conditions like epilepsy (though it is less commonly used now).
   • It may still appear as a component in some pharmaceutical formulations in trace amounts.

4. Photography:

   • Historically, KBr was used in photographic emulsions, particularly in the development process of certain types of films.

5. Preparation of Optical Components:

   • KBr is used in the manufacture of optical components, especially for infrared windows and lenses due to its ability to transmit infrared light.

6. In Water Treatment:

   • Potassium Bromide can also be used in water treatment applications, such as bromination in pools and other water systems.