Diatomaceous Earth CAS#61790-53-2
High Solubility: Diatomaceous earth is almost insoluble in water and most organic solvents, with excellent adsorption capacity for liquid and oil substances, which makes it suitable for filtration and adsorption applications.
Stable Structure: It is composed of amorphous silica fossil diatom shells, maintaining stable structure under normal temperature. It will transform into crystalline silica when calcined at ultra-high temperature, so high-temperature processing needs strict control.
Versatile Uses: It is widely used as filter aid, adsorbent, pesticide carrier, filler and anti-caking agent in multiple industries.
Porous Form & Dust Tendency: This material is supplied as off-white or light gray fine powder with porous structure, easy to generate dust during operation, requiring dust-proof handling.
Diatomaceous Earth, characterized by the molecular formula SiO₂, presents as off-white or light gray fine powder with porous amorphous silica structure. It is insoluble in water and ethanol, has strong oil absorption and adsorption performance. The pH of 10% suspension ranges from 9.0 to 10.0. The substance may irritate respiratory tract upon long-term dust inhalation, and is widely used for liquid filtration, impurity adsorption and functional filling.
Diatomaceous Earth Chemical Properties
| Item | Specification |
|---|---|
| Melting point | 1710 °C |
| Density | 2.3 g/cm³ |
| Storage temp | Store below +30°C |
| Solubility | Insoluble in water and common organic solvents |
| Form | Fine powder |
| Color | White / off-white / light gray |
| Odor | Odorless |
| PH | 9.0–10.0 (10% suspension, 20℃) |
| Water Solubility | Insoluble |
| Sensitive | Easy to produce dust |
| Stability | Stable at room temperature; converts to crystalline silica under high temperature calcination |
Diatomaceous Earth Safety Information
| Item | Specification |
|---|---|
| Hazard Codes | Xi |
| Risk Statements | 36/37 |
| Safety Statements | 22-26 |
| WGK Germany | 1 |
| HS Code | 25085000 |
| Packing | 25kg woven bag / jumbo bag |
This compound is employed as filter aid for beverage, oil and chemical liquid filtration, adsorbent for waste gas and wastewater treatment. It also functions as anti-caking agent and carrier for pesticide and fertilizer, serves as filler for rubber, coating and plastic, and is utilized as polishing agent and thermal insulation raw material. Additionally, it finds application in food processing filtration and feed additive fields.
