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| CAS No.: | 14464-46-1 |
|---|---|
| Name: | SILICA |
| Molecular Structure: | |
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|
|
| Formula: | O2Si |
| Molecular Weight: | 60.0843 |
| Synonyms: | Cristobalite(8CI);43-63C;Belcron B 6000;Crysvarl;Metacristobalite;SF 4000;Sibelco B 0012;Sibelite M 3000;SibeliteM 4000;Sibelite M 6000;Sihelco B 2500;Silbond 006MST;Silbond 3000MST;W006;WGL 300;XPF 6;a-Cristobalite;a-Crystobalite;Cristobalite (SiO2); |
| EINECS: | 238-455-4 |
| Density: | 2.6 g/mL at 25 °C(lit.) |
| Melting Point: | 1610 °C(lit.) |
| Boiling Point: | >100 °C(lit.) |
| Appearance: | colorless transparent granule |
| Hazard Symbols: |
 Xn, T
|
| Risk Codes: | 48/20 |
| Safety: | 22 |
| PSA: | 34.14000 |
| LogP: | -0.61840 |
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Consensus Reports
Standards and Recommendations
ACGIH TLV: TWA Respirable Fraction: 0.05 mg/m3
DFG MAK: 0.15 mg/m3
NIOSH REL: (Silica, Crystalline) TWA 50 μg/m3
Analytical Methods
Specification
The IUPAC name of this chemical is Silica,crystalline-cristobalite. With the CAS registry number 14464-46-1 and EINECS 238-455-4, it is also named as Crystoballite. In addition, the molecular formula is O2Si and the molecular weight is 60.0843. It belongs to the classes of Inorganic & Organic Chemicals and Inorganics. It is white amorphous superfine powder. It should be stored in a cool, ventilated and dry place. What's more, it can be used in bonding phosphor with glass plane, such as electronic tube, projection tube and depending on the wave tube.
Physical properties about this chemical are: (1)H-Bond Acceptor: 2; (2)Rotatable Bond Count: 0; (3)Exact Mass: 59.966756; (4)MonoIsotopic Mass: 59.966756; (5)Topological Polar Surface Area: 34.1; (6)Heavy Atom Count: 3; (7)Complexity: 18.3; (8)Covalently-Bonded Unit Count: 1; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 34.14 Å2.
Preparation of Silica,crystalline-cristobalite: it can be prepared by Sodium silicate solution and nitric acid.
When you are using this chemical, please be cautious about it as the following:
It has danger of serious damage to health by prolonged exposure through inhalation.You should not breathe dust when during using it.
You can still convert the following datas into molecular structure:
(1)SMILES: O=[Si]=O
(2)InChI: InChI=1S/O2Si/c1-3-2
(3)InChIKey: VYPSYNLAJGMNEJ-UHFFFAOYSA-N
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| human | TCLo | inhalation | 16mppcf/8H/17 (16mppcf) | LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)" LUNGS, THORAX, OR RESPIRATION: COUGH LUNGS, THORAX, OR RESPIRATION: DYSPNEA | National Technical Information Service. Vol. PB246-697, |
| rat | LDLo | intratracheal | 200mg/kg (200mg/kg) | LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)" | British Journal of Industrial Medicine. Vol. 10, Pg. 9, 1953. |