Product Overview and Physicochemical Properties

Potassium Bromide Analytical Titrant (SKU: P196966) is an inorganic potassium salt of hydrobromic acid with the molecular formula KBr. It appears as a white crystalline powder that is soluble in water and glycerol, slightly soluble in ethanol, and sparingly soluble in diethyl ether. The reagent possesses a pronounced salty taste with a slight bitterness. Its aqueous solution is neutral in pH, making it compatible with a wide range of titrimetric systems without introducing acid–base interference.

The compound is slightly hygroscopic, meaning it will absorb a small amount of atmospheric moisture under ambient laboratory conditions. This property necessitates careful storage to preserve solution concentration accuracy. Additionally, potassium bromide yellows upon prolonged exposure to light due to photolytic liberation of bromine, and therefore should be protected from direct light sources during storage and use.

Solubility Profile and Solvent Compatibility

Understanding the solubility profile of Potassium Bromide Analytical Titrant is essential for preparing accurate standard solutions and for designing compatible titration systems. The table below summarizes the solubility data provided for this product:

• Water at 20 °C: 650 g/L
• Water at 100 °C: 1020 g/L
• Ethanol at 25 °C: 1.42 g/L
• Glycerol: 217 g/L

The high aqueous solubility at room temperature makes water the solvent of choice for preparing KBr titrant solutions across a broad concentration range. Glycerol may be used as a co-solvent in specialized formulations. The very low solubility in ethanol means that ethanol-based matrices are generally incompatible with this reagent for titration purposes. Researchers should factor in the temperature dependence of water solubility when preparing heated or cooled solutions to avoid precipitation or concentration errors.

Storage, Handling, and Safety Guidelines

To maintain the integrity and concentration accuracy of Potassium Bromide Analytical Titrant, the following storage and handling guidelines should be observed:

• Light protection: Store in amber or opaque containers away from direct light. Photolytic yellowing indicates degradation and may compromise titration accuracy.
• Moisture control: Although only slightly hygroscopic, containers should be tightly sealed after each use. Desiccant storage is recommended in high-humidity environments.
• Temperature: Store at room temperature in a dry, well-ventilated area away from incompatible materials.
• Irritancy: The reagent is noted to be irritating. Appropriate personal protective equipment (PPE) including laboratory coat, chemical-resistant gloves, and safety glasses should be worn during handling.
• Waste disposal: Dispose of solutions in accordance with local and institutional regulations for inorganic bromide waste.

Always consult the current Safety Data Sheet (SDS) provided by Aladdin Scientific before use.

Analytical Applications and Method Compatibility

Potassium bromide is a well-established reagent in analytical chemistry, and its analytical-grade titrant formulation from Aladdin Scientific is suited for use in a range of titrimetric and spectroscopic applications:

• Argentometric titration (Mohr and Volhard methods): KBr serves as a reference standard or analyte in silver nitrate titrations for halide quantification.
• Infrared (IR) spectroscopy sample preparation: KBr is widely used to prepare transparent pellets for solid-sample FTIR analysis; the analytical purity grade ensures minimal spectral background interference.
• Bromide standard solutions: Used to prepare certified or in-house bromide standard solutions for ion chromatography (IC) calibration and method validation.
• Electroanalytical methods: Compatible with potentiometric titration using ion-selective electrodes (ISE) for bromide determination.

Researchers should verify that the specific concentration and purity specifications of this titrant lot meet the requirements of their particular pharmacopoeial or regulatory method before use.