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Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | Sigma-Aldrich | ||
| Product Grade | Analytical grade | Formula | K₂SO₄ |
Supelco® Potassium Sulfate, EMSURE® grade, is a high-purity salt designed for analytical chemistry and regulated laboratory applications. It conforms to ACS, ISO, and Reag. Ph Eur specifications, making it suitable for both research and quality control laboratories that require trace-level accuracy.
With a guaranteed assay of ≥99.0% (alkalimetric) and extremely low levels of impurities, including chloride (≤0.0005%), heavy metals (≤0.0005%), and arsenic (≤0.0002%), this product ensures reproducibility, traceability, and compliance with global standards.
Key Features
- High Purity: Assay ≥99.0% (alkalimetric).
- International Compliance: Meets ACS, ISO, and Reag. Ph Eur standards.
- Low Impurity Profile: Insoluble matter ≤0.01%, chloride ≤0.0005%, Fe ≤0.0005%, Na ≤0.02%.
- Quality Level 300: EMSURE® highest analytical quality.
- Reliable Traceability: Manufactured for critical laboratory and industrial use.
- Versatile Reagent: Suitable for analytical methods, fertilizer research, crystallization studies, and environmental testing.
Applications
- Analytical Chemistry: Reference reagent for titrations and quantitative analysis.
- Environmental Science: Used in soil and water testing.
- Agricultural Research: Fertilizer composition studies, cadmium/selenium bioavailability monitoring, and stress resilience in crops.
- Materials Science: Crystallization and nucleation process studies.
- Pharmaceutical & QC Labs: Conforms to pharmacopeia standards for regulated testing.
Specifications
| Property | Details |
|---|---|
| Assay (alkalimetric) | ≥99.0% |
| Form | Solid |
| pH (5% solution, 25 °C) | 5.5–8.5 |
| Insoluble Matter | ≤0.01% |
| Boiling Point | 1689 °C |
| Melting Point | 1069 °C |
| Density (20 °C) | 2.66 g/cm³ |
| Bulk Density | ~800 kg/m³ |
| Chloride (Cl⁻) | ≤0.0005% |
| Nitrogen (N) | ≤0.0005% |
| Heavy Metals (Pb) | ≤0.0005% |
| Arsenic (As) | ≤0.0002% |
| Calcium (Ca) | ≤0.005% |
| Iron (Fe) | ≤0.0005% |
| Magnesium (Mg) | ≤0.002% |
| Sodium (Na) | ≤0.02% |
| Storage Temperature | 2–30 °C |
| Conforms To | ACS, ISO, Reag. Ph Eur |
Packaging & Ordering Information
| Pack Size | SKU | Container |
|---|---|---|
| 1 kg | 1051531000 | Plastic bottle |
| 5 kg | 1051535000 | Plastic container |
Safety Information
- Hazard Classification: Generally considered safe; may cause mild irritation to eyes or respiratory tract in dust form.
- Precautions: Use gloves, goggles, and dust mask in laboratory handling. Store tightly closed in a cool, dry place.
Supelco® Potassium Sulfate EMSURE® is a premium-grade reagent conforming to ACS, ISO, and Ph Eur standards. With ≥99% purity and exceptionally low impurity levels, it is ideal for analytical chemistry, environmental testing, agricultural research, and regulated QC laboratories.
- Pack Size: 1kg 500g 5kg