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Thermo Scientific™ Selenium powder, 99+%
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Formula: Se
CAS Number: 7782-49-2
Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | Thermo Fisher Scientific™, thermo Scientific | ||
| Product Grade | Analytical grade | Formula | Se |
Thermo Scientific™ Selenium is a high-purity (≥99%) elemental selenium powder supplied in multiple packaging sizes for flexible use in chemical synthesis, semiconductor processing, materials science, and biological research. With a melting point of 224–225°C and boiling point of 690°C, this dark grey to black powdered form is suitable for both analytical and preparative workflows. Originally part of the Alfa Aesar product portfolio, this product is now distributed under the Thermo Scientific Chemicals brand.
Key Features & Benefits
- High Purity (≥99%): Assay validated for consistent performance in sensitive applications
- Fine Powder Form: Ensures even dispersion, increased surface area, and improved reactivity
- Low Trace Metal Impurities: Iron, lead, sulfur, nickel, and copper all maintained at ≤500 ppm or less
- Reliable Thermophysical Properties: Well-defined melting and boiling points for thermal processing
- Versatile Applications: Suitable for electronics, metallurgy, catalysis, glass manufacturing, and biological research
Chemical and Physical Properties
| Attribute | Value |
|---|---|
| Chemical Name | Selenium |
| CAS Number | 7782-49-2 |
| Molecular Formula | Se |
| Molecular Weight | 78.97 g/mol |
| Purity | ≥99% |
| Appearance (Color) | Dark grey to black |
| Appearance (Form) | Powder |
| Melting Point | 224–225°C |
| Boiling Point | 690°C |
| Synonyms | Elemental selenium, colloidal selenium, selenio |
| InChI Key | BUGBHKTXTAQXES-UHFFFAOYSA-N |
| SMILES | [Se] |
| MDL Numbers | MFCD00134090 / MFCD00011224 |
Impurity Profile (max limits)
| Impurity | Max Concentration |
|---|---|
| Iron (Fe) | ≤500 ppm |
| Lead (Pb) | ≤500 ppm |
| Sulfur (S) | ≤500 ppm |
| Nickel (Ni) | ≤100 ppm |
| Copper (Cu) | ≤100 ppm |
Applications
- Materials Science: Used in the production of semiconductors, glass, pigments, and alloys
- Analytical Chemistry: Reagent in redox reactions and trace element detection
- Biological Research: Investigations into selenium’s role as an essential micronutrient
- Catalysis: Applied in organoselenium chemistry and as a catalyst in organic synthesis
- Photovoltaics & Electronics: Key element in thin-film solar cells and thermoelectric materials
Ordering Information
| Catalog Number | Quantity | Packaging |
|---|---|---|
| A12592.0B | 1000 g | Glass bottle |
| 419271000 | 100 g | Glass bottle |
| 419275000 | 500 g | Glass bottle |
| A12592.18 | 50 g | Glass bottle |
| A12592.30 | 250 g | Glass bottle |
Storage & Handling
- Storage: Store in a tightly closed container in a cool, dry, and well-ventilated area
- Safety Note: Use personal protective equipment. Avoid inhalation and contact with skin and eyes
- Regulatory: RUO – Research Use Only. Not for use in diagnostic or therapeutic procedures
Thermo Scientific™ Selenium, Powder, ≥99% offers consistent, high-quality elemental selenium with low trace metal contamination, making it ideal for scientific, industrial, and high-tech applications. Its fine powdered form and flexible packaging sizes support diverse research and manufacturing needs.
- Pack Size: 250g 1kg 100g 500g 50g