- SILICA
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2026-06-05
- CAS:14464-46-1
- Purity: 0.99
- Silica
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- $20.60
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2026-05-28
- CAS:14464-46-1
- Min. Order: 1KG
- Purity: 96%
- Supply Ability: 5000kg
- SILICA
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- $1.00
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2019-07-06
- CAS:14464-46-1
- Min. Order: 1KG
- Purity: 98%
- Supply Ability: 1kg,5kg,100kg
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| | SILICA Chemical Properties |
| Melting point | 1610 °C(lit.) | | Boiling point | >100 °C(lit.) | | density | 2.6 g/mL at 25 °C(lit.) | | refractive index | n20/D 1.544(lit.) | | storage temp. | 2-8°C | | solubility | insoluble in H2O, acid solutions; soluble in HF | | form | tablets (~0.5 g each) | | color | colorless hexagonal, hexane crystals, crystalline | | Thermal Conductivity | 0.055 W/(m·K) | | crystal system | square | | Space group | P42212 | | Lattice constant | | a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.498 | 0.498 | 0.694 | 90 | 90 | 90 | 0.1721 |
| | InChI | InChI=1S/O2Si/c1-3-2 | | InChIKey | VYPSYNLAJGMNEJ-UHFFFAOYSA-N | | SMILES | [Si](=O)=O | | EPA Substance Registry System | Cristobalite (14464-46-1) |
| Hazard Codes | Xn,T | | Risk Statements | 48/20 | | Safety Statements | 22 | | OEB | D | | OEL | TWA: 0.05 mg/m3 | | WGK Germany | 3 | | RTECS | VV7340000 | | F | 3 | | TSCA | TSCA listed | | HS Code | 28112290 | | Storage Class | 6.1D - Non-combustible acute toxic Cat.3
toxic hazardous materials or hazardous materials causing chronic effects | | Hazard Classifications | STOT RE 1 Inhalation | | Toxicity | TCLo inhalation in human: 16mppcf/8H/17 |
| | SILICA Usage And Synthesis |
| Chemical Properties | Silicon dioxide/crystalline silica is a component of many mineral dusts and materials which melts to a glass at very high temperature. | | Uses | Because of its unique physical and chemical properties, crystalline silica has many uses. Commercially produced silica products include quartzite, tripoli, ganister, chert, and novaculite. Crystalline silica also occurs in nature as agate, amethyst, chalcedony, cristobalite, flint, quartz, tridymite, and, in its most common form, sand (IARC 1997). Naturally occurring silica materials are classified by end use or industry. Sand and gravel are produced almost exclusively for road building and concrete construction, depending on particle size and shape, surface texture, and porosity (IARC 1987).
| | Definition | A hygroscopic substance such as activated alumina, calcium chloride, silica gel, or zinc chloride. Such substances adsorb water vapor from the air and are used to maintain a dry atmosphere in containers for food packaging, chemical reagents, etc. | | Definition | Cristobalite: a mineral form of silicon(IV) oxide, SiO2. | | General Description | Rounded silica sand is the naturally occurring sand usually mined from glacial deposits, sometimes called Ottawa sands. Silica sand is essentially made of quartz (SiO2 ) grains.
Pressure range: 28 < σc < 35 MPa (4 < σc < 5 ksi)
Advantages: Low cost, low density, wide availability, and excellent chemical resistance in acidic media except those containing free HF
Drawbacks: Low permeability, low crushing strength, and poor resistance to flow back
| | Safety Profile | Confirmed carcinogen with experimental carcinogenic and tumorigenic data. Poison by intratracheal route. An inhalation hazard. Human systemic effects by inhalation: cough, dyspnea, fibrosis. About twice as toxic as silica in causing sihcosis. See also other sdica entries | | Synthesis | Squartz is silica, the chemical molecular formula for SiO2nH2O, because of its use is similar to carbon black and white, so it is named silica. Silica can be divided into precipitated silica (precipitated hydrated silica) and fumed silica (fumed silica) according to the different production methods, the two products have different production methods, properties and uses are also very different. The fumed production method mainly uses silicon tetrachloride and air combustion of silica, fine particles, median particle size up to 5 microns or less. Precipitation method uses sodium silicate with sulfuric acid to precipitate the silica. The median particle size is about 7-12 microns. Fumed silica is expensive, does not easily absorb moisture, and is more commonly used in coatings as a matting agent. | | Potential Exposure | Cristobalite is used in the manufacture of water glass, refractories, abrasives, ceramics and enamels. Quartz is used as a mineral, natural or synthetic fiber. Tridymite is used as a filtering and insulating media and as a refractory material for furnace linings. Workers are potentially exposed to crystalline silica in such industries as granite quarrying and cutting, foundry operations; metal, coal, dentistry, painting, and nonmetallic mining; and manufacture of clay and glass products. | | Carcinogenicity | Respirable crystalline silica, primarily quartz dusts occurring in industrial and occupational settings, is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans. Respirable crystalline silica was first listed in the Sixth Annual Report on Carcinogens in 1991 as reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals; the listing was revised to known to be a human carcinogen in the Ninth Report on Carcinogens in 2000. | | Incompatibilities | Violent reactions with powerful oxidizers: fluorine, chlorine trifluoride; manganese trioxide; oxygen difluoride, hydrogen peroxide, etc.; acetylene; ammonia. | | Toxics Screening Level | The Initial Threshold Screening Level for crystalline silica is 3 μg/m3, with an annual
averaging time. This ITSL applies to quartz (CAS No. 14808-60-7) and three polymorphs:
cristobalite (CAS No. 14464-46-1), tridymite (CAS No. 15468-32-3) and tripoli (CAS No.
1317-95-9). | | Waste Disposal | Sanitary landfill |
| | SILICA Preparation Products And Raw materials |
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