气相二氧化硅 疏水,比表面积：150m2/g
Silica,fumed
品牌：桔子
产品编号：V33953
CAS号：112945-52-5
分子式：SiO2
分子量：60.08
气相二氧化硅
| 中文名称 : | 气相二氧化硅 |
|---|---|
| 英文名称 : | Silica,fumed |
| 中文别名 : | 未提供 |
| 英文别名 : | 未提供 |
| CAS号 : | 112945-52-5 |
| 分子式 : | SiO2 |
| 分子量 : | 60.08 |
| SMILES Code : | 尚未取得 |
| MDL NO : | 尚未取得 |
| Pubchem ID : | 24261 |
| InChIKey : | VYPSYNLAJGMNEJ-UHFFFAOYSA-N |
实验性质
| 外观 / 形态 : | Transparent to gray, odorless powder. Irritating to the skin and eyes on contact. Inhalation will cause irritation in the respiratory tract. [Note: Amorphous silica is the non-crystalline form of SiO2.]；Dry Powder; Other Solid; Large Crystals; CBI；Dry Powder; Wet Solid; Other Solid; Large Crystals; CBI; Liquid；Dry Powder; Large Crystals; Dry Powder; Large Crystals; Wet Solid; Dry Powder; Liquid; Liquid; Large Crystals; Liquid; Liquid; Other Solid; Dry Powder; Other Solid; Dry Powder; Large Crystals; Liquid; Other Solid; Dry Powder; Large Crystals; Liquid; Wet Solid; Other Solid; Other Solid; Wet Solid; Large Crystals; Dry Powder; Wet Solid; Other Solid; Dry Powder; Wet Solid; Large Crystals; Other Solid; CBI；Liquid; Other Solid; Dry Powder；White, fluffy powder or granules. Hygroscopic；Transparent to gray, odorless powder. [Note: Amorphous silica is the non-crystalline form of SiO2.]; [NIOSH]；Solid；COLOURLESS OR WHITE CRYSTALS.；Transparent to gray, odorless powder. [Note: Amorphous silica is the non-crystalline form of SiO2.] |
|---|---|
| 颜色 / 形态 : | Amorphous powder；Transparent to gray powder (Note: Amorphous silica is the non-crystalline form of O2Si). ... solid；Silica gel is a coherent, rigid, continuous three-dimensional network of spherical particles of colloidal microporous silica.；Transparent crystals |
| 气味 : | Odorless |
| 沸点 : | 4046 °F at 760 mmHg (NIOSH, 2024)；4046 °F；2230 °C；2950 °C @760 [mm Hg] |
| 熔点 : | 3110 °F (NIOSH, 2024)；3110 °F；1710 °C；1716 - 1736 °C；1713 °C；1722 °C |
| 溶解性 : | Insoluble (NIOSH, 2024)；The solubility of the various phases of silicas is very complex and depends upon several factors. Solubility increases with temperature and pH and is affected by the presence of trace metals. Particle size influences the rate of solubility. /Silica/；Insoluble；Silica is rather poorly soluble in water although solubility is higher for the amorphous than for the crystalline morphologies. ... The external amorphous layer in quartz is more soluble than the crystalline underlying core.；AMORPHOUS IS SOL IN ALKALIES, ESP WHEN FINELY DIVIDED；Practically insoluble in water or acids. Dissolves readily in HF, forming silicon tetrafluoride.；Very slightly sol in alkali.；Soluble in hot potassium hydroxide and hot sodium hydroxide solutions. Insoluble in ethanol.；Silica is rather poorly soluble in water and solubility is lower for the crystalline than for the amorphous morphologies. ...Solubility increases with temperature and pH and is affected by the presence of trace metals. Particle size influences the rate of solubility.；The external amorphous layer in quartz (the Beilby layer) is more soluble than the crystalline underlying core.；Solubility in water: none |
| 密度 : | 2.2 (NIOSH, 2024) - Denser than water; will sink；2.2 @ 25 °C；2.6；Colorless crystals or white powder; odorless and tasteless; density: 2.2-2.6; soluble in molten alkai when finely divided and amorphous /Silicon dioxide/；Density = 2.648 /alpha-Quartz/ /from table/；Density = 2.269 /alpha-Tridymite/ /from table/；Density = 2.318 /alpha-Cristobalite/ /from table/；Density = 2.909 /Coesite/ /from table/；Density = 4.287 /Stishovite/ /from table/；2.3 g/cm³；2.334 @25 °C；2.2 @25 °C；2.20 |
| 蒸气压 : | 0 mmHg (approx) (NIOSH, 2024)；approx 0 mm Hg；10 mm Hg @ 1732 °C；0 mmHg (approx) |
资料来源：气相二氧化硅产品资料页；来源页标注 PubChem CID 24261，资料日期 。
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