Description
Specifications Table
Product Name – Chromium(III) oxide, Puratronic™, 99.97% (metals basis) Quantity/Pack Size – 500g, 100g, 25g, 5g Form – Powder Grade – Puratronic™ (99.97% metals basis) Application – High-temperature ceramics, catalysts, analytical standards, refractory materials
Product Overview
Chromium(III) oxide (Cr₂O₃) from the Puratronic™ line represents the pinnacle of purity for chromium compounds, with a guaranteed 99.97% metals basis certification. This high-performance material is synthesized under stringent conditions to eliminate trace contaminants, ensuring consistency for demanding laboratory and industrial processes. The fine powder form offers superior reactivity and homogeneity, making it particularly suitable for applications where uniformity is critical. Its exceptional thermal stability (melting point: 2,435°C) and resistance to chemical corrosion render it indispensable in refractory formulations, while its green pigment properties are leveraged in specialized ceramic glazes. The Puratronic™ grade undergoes rigorous multi-stage purification, including zone refining and sublimation, to achieve ultra-low levels of alkali metals, halides, and other common impurities that could compromise experimental results. Unlike standard technical grades, this material is specifically processed to minimize particle agglomeration, enhancing its performance in catalytic systems and thin-film depositions. The product’s tightly controlled particle size distribution (typically 1-5 microns) ensures optimal flow characteristics for automated dispensing systems in research environments. As a stable oxide form of chromium, it avoids the hygroscopic issues associated with chromium salts while maintaining high solubility in acidic media for solution-based applications.
FAQs
1. What is the difference between Puratronic™ and standard chromium(III) oxide grades?
Puratronic™ chromium(III) oxide undergoes additional purification steps including zone refining and sublimation to achieve 99.97% purity with significantly lower trace metal contaminants compared to standard grades which typically range between 97-99% purity. The Puratronic™ process specifically targets removal of alkali metals, halides, and transition metal impurities that could interfere with sensitive applications.
2. Can this chromium(III) oxide be used for thin-film deposition applications?
Yes, the fine particle size (1-5 microns) and high purity make this grade suitable for physical vapor deposition (PVD) and chemical vapor deposition (CVD) processes. The low impurity profile minimizes defect formation in thin films, while the consistent particle morphology ensures uniform evaporation rates during deposition.
3. What precautions should be taken when handling this high-purity chromium(III) oxide?
While chromium(III) oxide is less hazardous than chromium(VI) compounds, standard lab precautions should be followed. Use in a well-ventilated area or fume hood, wear appropriate PPE including gloves and safety glasses, and avoid generating dust. The material is stable under normal conditions but may react violently with strong reducing agents at high temperatures.
4. How should this product be stored to maintain its purity?
Store in a tightly sealed container in a cool, dry environment away from direct sunlight and moisture. The original packaging is designed with a moisture barrier; reseal carefully after each use. For long-term storage, consider adding desiccant packets to the container and maintain temperature below 30°C to prevent any potential degradation.
5. What analytical techniques are recommended for verifying the purity of this chromium(III) oxide?
Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is the preferred method for trace metal analysis, while X-ray Fluorescence (XRF) can confirm the major elemental composition. For structural verification, X-ray Diffraction (XRD) is recommended to confirm the corundum crystal structure. The manufacturer provides a certificate of analysis with each batch detailing these test results.
