Industrial-grade chromatographic silica gel 300-400 mesh is a white powder or granular material primarily composed of silicon dioxide. It features stable chemical properties and strong hygroscopicity, making it widely applicable in petroleum product refining, separation and purification of organic substances, catalyst carriers, and the preparation of high-purity materials. Below is a summary of its key information:

1. ?Product Characteristics?

• ?Physical Properties?: White powder or uniform granules, odorless and tasteless, with a particle size range of 300-400 mesh (approximately 38-75 micrometers).
• ?Chemical Properties?: High-temperature resistance (up to 750°C), decolorization rate as high as 99%, moisture content around 5%, and a typical shelf life of 1-3 years.
• ?Separation Principle?: Achieves substance separation through differences in adsorption capacity, with polar components having longer retention times and non-polar components having shorter retention times.

2. ?Main Applications?

• ?Petroleum Industry?: Removal of aromatic substances and refining of petroleum products.
• ?Chemical and Pharmaceutical Industries?: Extraction of active ingredients from Chinese herbal medicine, preparation of high-purity substances, and use as a chromatographic support.
• ?Other Applications?: Selective adsorption of organic gases/liquids and use as a catalyst carrier.
• 3. ?Precautions?
• • ?Storage?: Must be sealed and protected from moisture to prevent performance degradation due to hygroscopicity.