Potassium dihydrogen phosphate 99.5% or Monopotassium phosphate (MKP) or Potassium phosphate monobasic or Potassium dihydrogen orthophosphate

Product Overview & Quality

Product Name: Potassium dihydrogen phosphate 99.5% or Monopotassium phosphate (MKP) or Potassium phosphate monobasic or Potassium dihydrogen orthophosphate
Brand: QReC (Product Code: QR-P5104-1-0500)
Grade: Analytical Reagent High Purity Grade (AR Grade) featuring an exceptional certified chemical assay of not less than 99.5 percent. Manufactured and multi-recrystallized under strict QReC global laboratory specifications without anti-caking additives. Strictly monitored to enforce low loss on drying (strictly below 0.2 percent), along with minimal ppm limits of chloride, sulfate, total nitrogen, silica, water-insoluble matter, and trace heavy metals (such as iron, lead, copper, arsenic, zinc, sodium, calcium, and magnesium). Conforms to certified DNase and RNase-free specifications, ensuring non-degrading integrity in molecular biology and enzymatic protocols. Exhibits dry, uniform crystals with low background ultraviolet absorbance at 260 and 280 nanometers, dissolving cleanly and rapidly in water to yield transparent, residue-free acidic buffer solutions. Packaged in a heavy-duty, moisture-barrier polymer container equipped with a hermetic seal.
Physical Properties: Colorless crystals, crystalline granules, or fine white crystalline powder. Odorless with a faint, saline-acidic taste. Thermodynamically stable under ambient atmospheric conditions. Non-combustible and non-corrosive solid. Aqueous solutions are mildly acidic (pH approximately 4.2 to 4.5 for a 5 percent aqueous solution at room temperature).
Solubility: Readily and highly soluble in water (approximately 22 to 25 grams per 100 milliliters at 20 degrees Celsius; solubility escalates to over 80 grams per 100 milliliters in boiling water); slightly soluble in glycerol; practically insoluble in ethanol.
Key Use: Heavily utilized as the primary acidic buffer component paired with dipotassium hydrogen phosphate (DKP) to prepare physiological Potassium Phosphate Buffer systems (pH 5.8 to 8.0) for cell culture, molecular biology, immunology, and enzyme kinetic assays. Extensively applied as a high-precision mobile phase buffer modifier in High-Performance Liquid Chromatography (HPLC) to optimize chromatographic retention, ionization, and peak resolution of pharmaceuticals, peptides, and organic acids. Serves as a vital, bioavailable source of phosphorus and potassium in microbial culture media (bacteria, yeast, and fungi), plant tissue culture media formulations (such as Murashige and Skoog media), and bioprocess fermentations. Widely used in formulating primary standard buffer solutions for calibrating laboratory pH electrodes. Employed as an analytical reagent in protein purification protocols and clinical diagnostics.

Safety & Hazards

Classification: Non-hazardous substance under standard GHS criteria in typical laboratory usage. Exceptionally low acute toxicity profile; particulate dust may exert mild mechanical irritation to ocular, dermal, and respiratory surfaces.
Health Risks: Direct eye contact may cause transient mechanical stinging, conjunctival redness, or lacrimation. Prolonged dermal contact may produce mild dryness or superficial irritation. Inhalation of particulate dust can cause minor sneezing, coughing, or upper respiratory discomfort. Ingestion of excessive quantities may provoke transient gastrointestinal upset, abdominal cramps, nausea, or osmotic laxative effects characteristic of concentrated potassium and phosphate salts.
First Aid Measures: Flush affected eyes thoroughly with clean running water for at least 10 to 15 minutes. Wash exposed skin with soap and water. In case of dust inhalation, relocate the individual to fresh air. If accidentally swallowed in substantial amounts, rinse mouth thoroughly, drink water, and seek medical advice if discomfort persists.

Handling & Storage

Storage: Stable Analytical Buffer Salt. Must be preserved in its original, tightly closed QReC container. Store in a clean, strictly dry, cool, and well-ventilated dedicated chemical store at stable room temperature (below 25 to 30 degrees Celsius), sheltered from excessive humidity and direct solar radiation. Keep strictly segregated from strong alkalis (which induce exothermic neutralization reactions) and strong oxidizing agents.
Precautions: Standard laboratory PPE is mandatory, including protective gloves, safety glasses, and a protective lab coat. Re-seal container cap tightly immediately after sampling. Minimize dust generation during weighing and dispensing.