A5465312
magnetic particles embedded in SiO2 , Base: SIO2, Surface Group: -COOH, particle size: 4-5 μm, unit: 10 mg/ml , 7631-86-9
Synonym(s):
Silica;Silicon dioxide;Silica gel;Quartz;SBA-15
CAS NO.：7631-86-9
Empirical Formula: O2Si
Molecular Weight: 60.08
MDL number: MFCD00148343
EINECS: 231-545-4
| Pack Size | Price | Stock | Quantity |
| 5ML | RMB264.80 | In Stock |
|
| others | Enquire |
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | >1600 °C(lit.) |
| Boiling point: | >100 °C(lit.) |
| Density | 2.2-2.6 g/mL at 25 °C |
| vapor pressure | 13.3hPa at 1732℃ |
| refractive index | 1.46 |
| Flash point: | 2230°C |
| storage temp. | 2-8°C |
| solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
| pka | 6.65-9.8[at 20 ℃] |
| form | suspension |
| Specific Gravity | 2.2 |
| color | White to yellow |
| PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
| Odor | at 100.00?%. odorless |
| Resistivity | 1∞10*20 (ρ/μΩ.cm) |
| Water Solubility | insoluble |
| Sensitive | Hygroscopic |
| Hydrolytic Sensitivity | 6: forms irreversible hydrate |
| Crystal Structure | Trigonal |
| Merck | 14,8493 |
| Exposure limits | NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3 |
| 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) |
Description and Uses
manufacture of glass, water glass, refractories, abrasives, ceramics, enamels; decolorizing and purifying oils, petroleum products, etc.; in scouring- and grinding-compounds, ferrosilicon, molds for castings; as anticaking and defoaming agent.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H317-H412 |
| Precautionary statements | P261-P272-P273-P280-P302+P352-P333+P313 |
| Hazard Codes | Xn,Xi |
| Risk Statements | 36/37/38-36/37-22-43-52/53-36/38 |
| Safety Statements | 26-37/39-36-36/37/39-36/37-61 |
| OEB | B |
| OEL | TWA: 6 mg/m3 |
| HS Code | 2811221000 |
| Toxicity | LC inhalation in rat: > 200gm/m3/1H |
| IDLA | 3,000 mg/m3 |
