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The Periodic Acid Solution by IBEX SCIENCES is a vital, ready-to-use oxidizing reagent designed for histology, pathology, and diagnostic cytology laboratories. It serves as the definitive precursor molecule needed to initiate the popular Periodic Acid-Schiff (PAS) staining technique. [1, 2, 3, 4, 5]
Mechanism of Action
- Selective Oxidation: When applied to tissue sections, periodic acid specifically acts upon glycol structures (such as carbohydrates, glycoproteins, and mucins). [1, 2]
- Aldehyde Formation: It oxidizes the adjacent 1,2-glycol groups of these carbohydrates, chemically breaking the carbon-carbon bonds to form exposed, reactive dialdehyde groups. [1]
- Preparing for the PAS Reaction: This solution does not add color on its own. Instead, it unmasks these aldehyde locations so that when Schiff’s Reagent Solution is applied next, it can bind to them and blossom into a vibrant magenta/purple hue. [1, 2, 3]
Primary Laboratory Applications
- Tissue Complex Visualization: Essential for the diagnostic identification of glycogen storage diseases, mucus-secreting tumors, and neutral mucopolysaccharides. [1, 2]
- Basement Membrane Assessment: Highlights renal glomerular basement membranes, making it a critical tool in nephropathology. [1, 2]
- Fungal Mycological Detection: Because fungal cell walls are highly rich in polysaccharides, treating a slide with Periodic Acid Solution easily isolates fungal organisms (such as Candida albicans or Aspergillus) within tissue matrices. [1, 2]
Routine Staining Steps (PAS Routine)
- Step 1: Deparaffinize and rehydrate tissue slides down to distilled water.
- Step 2: Immerse slides in Periodic Acid Solution (typically 0.5% to 1.0% concentration) for 5 to 10 minutes at room temperature.
- Step 3: Rinse thoroughly with distilled water to remove excess unreacted acid.
- Step 4: Move directly to the Schiff’s Reagent Solution bath to finalize the purple color conversion. [1, 2, 3, 4, 5]
Handling & Storage Guidance
- Storage Temperature: Keep the reagent bottle tightly capped in a dark environment at standard room temperature (15°C to 25°C). Do not freeze or expose to extreme cold.
- Light Prevention: Because it is an oxidative solution, prolonged exposure to direct sunlight can degrade the concentration over time. [1, 2, 3, 4]
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