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VWR di-Potassium hydrogen phosphate (dibasic) ≥97%, GPR RECTAPUR®
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Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical, Buffer | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | K₂HPO₄ |
VWR Di-Potassium Hydrogen Phosphate (K₂HPO₄) is a high-purity, water-soluble inorganic salt supplied under the GPR RECTAPUR® grade, with an assay range of 99.5–101.0%. This compound is widely used in buffer formulation, analytical and instrumental chemistry, nutrient media, and industrial applications where precise control of pH and ionic strength is required.
Its excellent purity and low heavy metal content make it suitable for reagent preparation, chemical synthesis, biological testing, and environmental quality control.
Product Specifications
| Property | Value |
|---|---|
| Product Name | Di-Potassium Hydrogen Phosphate |
| Chemical Formula | K₂HPO₄ |
| Molecular Weight | 174.18 g/mol |
| CAS Number | 7758-11-4 |
| MDL Number | MFCD00011383 |
| Merck Index | 13,07743 |
| EINECS Number | 231-834-5 |
| Melting Point | 340 °C |
| Density (20 °C) | 2.3 g/cm³ |
| Storage Temperature | Ambient |
| Grade | GPR RECTAPUR® |
| Physical Form | White crystalline solid |
Purity & Impurity Limits
| Parameter | Specification |
|---|---|
| Assay | 99.5 – 101.0% |
| Heavy Metals (as Pb) | ≤ 5 ppm |
| Ignition Residue (as SO₄) | ≤ 0.02% |
| Water Insolubles | ≤ 50 ppm |
| Chloride (Cl⁻) | ≤ 20 ppm |
| Nitrate (NO₃⁻) | ≤ 20 ppm |
| Sulfate (SO₄²⁻) | ≤ 20 ppm |
| Calcium (Ca²⁺) | ≤ 20 ppm |
| Iron (Fe³⁺) | ≤ 5 ppm |
| Potassium (K⁺) | ≤ 100 ppm |
| Magnesium (Mg²⁺) | ≤ 10 ppm |
| Sodium (Na⁺) | ≤ 50 ppm |
Packaging Options
| Catalog Number | Pack Type | Pack Size |
|---|---|---|
| 26930.260 | Plastic bottle (solid) | 500 g |
| 26930.293 | Plastic bottle (solid) | 1 kg |
| 26930.362 | Plastic bucket | 5 kg |
Applications
- Buffer solution preparation (e.g., phosphate buffers)
- Component in nutrient media for microbiology and cell culture
- Reagent for volumetric and instrumental analysis
- Additive in water treatment processes
- Analytical standard for ion chromatography or ICP-OES
- Use in agriculture and fertilizer formulations
- Stabilizing salt in biochemical assays
Safety and Handling
- Classified as non-flammable and non-toxic under standard use
- Use appropriate PPE (gloves, goggles) when handling powders
- Avoid contact with strong acids
- Store in a dry, sealed container at ambient temperature
- Dispose of according to local regulations
- Refer to the SDS for detailed handling and hazard precautions
VWR Di-Potassium Hydrogen Phosphate ≥97%, GPR RECTAPUR® is a highly reliable reagent for laboratory and industrial applications requiring controlled buffering, high purity, and low contaminant levels. Whether used in analytical chemistry, biological preparations, or environmental analysis, this salt delivers performance and consistency essential to modern workflows.
- Pack Size: 1kg 500g Plastic bucket, 5kg