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VWR Potassium chromate ≥99.5%, AnalaR NORMAPUR® analytical reagent
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Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | K₂CrO₄ |
VWR Potassium Chromate is a high-purity analytical reagent with an assay of 99.5–101.0%, manufactured under AnalaR NORMAPUR® standards. It is suitable for trace-level analytical work, redox titrations, and applications requiring a reliable oxidizing or indicator agent. Conforming to European Pharmacopoeia (Ph. Eur.) specifications, this compound is used in various regulated laboratory and industrial processes.
Key Features and Benefits
- High assay (99.5–101.0%) for reproducible analytical results
- Conforms to AnalaR NORMAPUR® and Ph. Eur. quality standards
- Excellent solubility and solution clarity in water
- Low trace metal and impurity content for high-precision analysis
- Stable under ambient conditions for convenient storage
Applications
- Analytical reagent for redox titration (e.g., Mohr’s method)
- Indicator in chloride determination
- Oxidizing agent in inorganic and environmental analysis
- Chromate standard in chemical testing and education
- Research on transition metal salts and their reactivity
Technical Specifications
| Property | Specification |
|---|---|
| Assay (on dried substance) | 99.5 – 101.0% |
| Appearance of Solution S | Passes test (Ph. Eur.) |
| Identification A & B | Passes test (Ph. Eur.) |
| Acidity or Alkalinity | ≤ 0.0005 meq/g |
| pH (5% solution) | 5.0 – 8.0 |
| Heavy Metals (as Pb) | ≤ 5 ppm |
| Insolubility in Water | ≤ 100 ppm |
| Loss on Drying (105 °C) | ≤ 1.0% |
| Mg and Alkaline Earth Metals (as Ca) | ≤ 0.02% |
| Total Nitrogen (N) | ≤ 40 ppm |
| Bromide (Br⁻) | ≤ 0.1% |
| Iodide (I⁻) | ≤ 20 ppm |
| Phosphate (PO₄³⁻) | ≤ 5 ppm |
| Sulphate (SO₄²⁻) | ≤ 50 ppm |
| Aluminium (Al) | ≤ 10 ppm |
| Arsenic (As) | ≤ 0.5 ppm |
| Barium (Ba) | ≤ 10 ppm |
| Calcium (Ca) | ≤ 10 ppm |
| Copper (Cu) | ≤ 2 ppm |
| Iron (Fe) | ≤ 2 ppm |
| Sodium (Na) | ≤ 0.03% |
| Melting Point | 985 °C |
| Boiling Point | 1000 °C (at 1013 hPa) |
| Density (20 °C) | 2.73 g/cm³ |
| Storage Conditions | Ambient |
| Merck Index | 12,07784 |
| EINECS Number | 232-140-5 |
| UN Number | 3087 |
| ADR Classification | 5.1 (oxidizer), 6.1 (toxic), PG III |
Packaging Information
| Catalog Number | Pack Type | Quantity |
|---|---|---|
| 26774.236 | Plastic bottle for solids | 250 g |
| 26774.293 | Plastic bottle for solids | 1 kg |
VWR Potassium Chromate, AnalaR NORMAPUR® grade, offers a robust solution for laboratories conducting high-precision redox titrations, trace contaminant detection, or analytical method development. Its conformity to Ph. Eur. standards and tightly controlled impurity profile make it a reliable choice for research and regulated laboratory applications.
- Pack Size: 250g 1kg