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7631-86-9
bosschemical
7631-86-9
| Silicon dioxide Basic information | |
| Product Name: | Silicon dioxide |
| CAS: | 7631-86-9 |
| MF: | O2Si |
| MW: | 60.08 |
| EINECS: | 231-545-4 |
| Mol File: | 7631-86-9.mol |
| Silicon dioxide Chemical Properties | |
| Melting point | >1600 °C(lit.) |
| Boiling point | >100 °C(lit.) |
| density | 2.2-2.6 g/mL at 25 °C |
| refractive index | 1.46 |
| Fp | 2230°C |
| storage temp. | Refrigerator (+4°C) |
| solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
| form | suspension |
| color | White to yellow |
| Specific Gravity | 2.2 |
| Specific Gravity | 0.97 |
| Specific Gravity | 1.29 |
| PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
| Water Solubility | insoluble |
| Sensitive | Hygroscopic |
| Hydrolytic Sensitivity | 6: forms irreversible hydrate |
| Hydrolytic Sensitivity | 5: forms reversible hydrate |
| Hydrolytic Sensitivity | 4: no reaction with water under neutral conditions |
| Merck | 148,493 |
| Stability: | Stable. |
| CAS DataBase Reference | 7631-86-9(CAS DataBase Reference) |
| IARC | 3 (Vol. Sup 7, 68) 1997 |
| NIST Chemistry Reference | Silicon(iv) oxide(7631-86-9) |
| EPA Substance Registry System | Silica (7631-86-9) |
COA：
| Items | Specification | Results |
| Specific surface area | 176-225m2/g | 205m2/g |
| PH value in aqueous dispersion | 3.7-4.5 | 4.14 |
| Loss on drying at 105℃ | ≤2.0% | 0.53% |
| Ignition loss at 1000℃ | ≤2.5% | 0.53% |
| 45μm sieve residue | ≤0.025% | 0.02% |
| Tamped density | 30-60g/L | 46 |
| SiO2 | ≥99.8% | 99.87% |
| Carbon content | ≤0.2% | 0.03% |
| Silicon dioxide Basic information | |
| Product Name: | Silicon dioxide |
| CAS: | 7631-86-9 |
| MF: | O2Si |
| MW: | 60.08 |
| EINECS: | 231-545-4 |
| Mol File: | 7631-86-9.mol |
| Silicon dioxide Chemical Properties | |
| Melting point | >1600 °C(lit.) |
| Boiling point | >100 °C(lit.) |
| density | 2.2-2.6 g/mL at 25 °C |
| refractive index | 1.46 |
| Fp | 2230°C |
| storage temp. | Refrigerator (+4°C) |
| solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
| form | suspension |
| color | White to yellow |
| Specific Gravity | 2.2 |
| Specific Gravity | 0.97 |
| Specific Gravity | 1.29 |
| PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
| Water Solubility | insoluble |
| Sensitive | Hygroscopic |
| Hydrolytic Sensitivity | 6: forms irreversible hydrate |
| Hydrolytic Sensitivity | 5: forms reversible hydrate |
| Hydrolytic Sensitivity | 4: no reaction with water under neutral conditions |
| Merck | 148,493 |
| Stability: | Stable. |
| CAS DataBase Reference | 7631-86-9(CAS DataBase Reference) |
| IARC | 3 (Vol. Sup 7, 68) 1997 |
| NIST Chemistry Reference | Silicon(iv) oxide(7631-86-9) |
| EPA Substance Registry System | Silica (7631-86-9) |
COA：
| Items | Specification | Results |
| Specific surface area | 176-225m2/g | 205m2/g |
| PH value in aqueous dispersion | 3.7-4.5 | 4.14 |
| Loss on drying at 105℃ | ≤2.0% | 0.53% |
| Ignition loss at 1000℃ | ≤2.5% | 0.53% |
| 45μm sieve residue | ≤0.025% | 0.02% |
| Tamped density | 30-60g/L | 46 |
| SiO2 | ≥99.8% | 99.87% |
| Carbon content | ≤0.2% | 0.03% |
