Precipitated silica, a form of synthetic amorphous silicon dioxide, is derived from quartz sand, a crystalline form of silicon dioxide. The physical properties of precipitated silica can be manipulated during the manufacturing process to deliver products with a wide range of performance-enhancing features engineered for many different end-use applications, such as RUBBERS AND TIRES, FOOD, FEED, SILICON RUBBER ,PLASTICS ect.
| CERTIFICATE OF ANALYSIS | |||
| PRECIPITATED SILICA SP-260 Feed Grade | |||
| No | Item | Micro Pearl | Powder |
| 1 | Appearance | White Micron | White Powder |
| 2 | SiO2 content(on wet basis) % | ≥96 | ≥96 |
| 3 | Loss on heating (105ºC) % | ≤6.5 | ≤6.5 |
| 4 | Loss on ignition (1000±25ºC) % | ≤8.5 | ≤8.5 |
| 5 | PH Value | 6.0-7.5 | 6.0-7.5 |
| 6 | DBP (oil absorption value) cm3/g | 2.4-3.0 | 2.4-3.0 |
| 7 | Salt as Na2SO4 % | ≤4 | ≤4 |
| 8 | Heavy Metal(Pb) mg/kg | ≤30 | ≤30 |
| 9 | As mg/kg | ≤3.0 | ≤3.0 |
| 10 | Cd mg/kg | ≤0.5 | ≤0.5 |
| 11 | Pb mg/kg | ≤5 | ≤5 |
| 12 | Average grain Diameter D50 μm | 150-250 | 80-150 |