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When sourcing Potassium Chloride (KCl) through a scientific supplier like Ibex Sciences, a 250 Gram container represents a standard bulk laboratory or analytical reagent pack size. [1]
Potassium chloride is a metal halide salt that appears as white, odorless, cubic crystals or a crystalline powder. Highly stable and deeply vital to biological processes, a 2.5 kg quantity is highly suited for high-throughput laboratory preparation, molecular biology workflows, and analytical calibration. [1, 2, 3, 4, 5]
1. Key Chemical Properties and Specifications
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- CAS Number: 7447-40-7 [1]
- Molecular Formula: KCl
- Purity Grades: Commonly supplied as Analytical Reagent (AR) or ACS Grade (Assay ≥ 99.0%). It is naturally anhydrous and exhibits exceptional solubility in water. [1, 2, 3]
- Biological Compatibility: Frequently available in “Cell Culture” or “Molecular Biology” grades, ensuring it is strictly free from trace heavy metal contaminants, DNase, and RNase. [1, 2, 3, 4]
2. Primary Laboratory Applications
A 2500-gram supply is typically used for preparing large-volume solutions or running routine electrochemical and biological assays:
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- Electrochemical Reference Standards: Potassium chloride solutions are the absolute industry standard for filling and storing pH electrodes, conductivity cells, and reference electrodes (such as Silver/Silver Chloride electrodes). [1]
- Biological Buffer Preparation: It is a foundational component in preparing vital physiological saline and biological buffer solutions, such as Phosphate-Buffered Saline (PBS) and Tris-Buffered Saline (TBS), which mimic cellular ionic strength.
- Molecular Biology and Genetics: Used in DNA and RNA extraction protocols to aid in the precipitation of proteins and genetic material.
- Infusion and Media Formulation: Applied in microbiology and tissue culture labs to formulate growth media for plants, bacteria, and animal cells.
3. Safety, Handling, and Storage Guidelines
Potassium chloride has a very low toxicity profile, but proper handling remains a cornerstone of good laboratory practice:
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- Low Hazard Classification: It is non-hazardous, non-combustible, and carries no restrictive GHS transport regulations.
- Basic PPE: Personnel should wear standard laboratory protection—including safety glasses, nitrile gloves, and a lab coat—primarily to avoid mild mechanical eye irritation or drying of the skin.
- Storage Requirements: Potassium chloride is slightly hygroscopic and can form hard cakes or clumps if exposed to ambient humidity over long periods. Store the 2.5 kg container tightly sealed in a cool, dry, well-ventilated chemical cabinet. [1, 2, 3, 4, 5]
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