メタけい酸
メタけい酸 · 二酸化けい素N水和物 · HYDRATED SILICA · PRECIPITATED SILICA · bio-sil · Silicic · SILICA ACID · Kieselsre
識別子と物理属性
| CAS No. | 1343-98-2 |
|---|---|
| 分子式 | H2O3Si |
| 平均分子量 | 78.099 g/mol |
| 単同位体質量 | 77.97732045 g/mol |
| SMILES | O=[Si](O)O |
| InChIKey | IJKVHSBPTUYDLN-UHFFFAOYSA-N |
| PubChem CID | 14768 |
| EC No. | 231-716-3 |
| DTXSID | DTXSID30872499 |
| 現地名 | メタけい酸 |
化学・物理的性質
| 極性表面積 | 57.5 |
|---|---|
| 水素結合供与体数 | 2 |
| 水素結合受容体数 | 3 |
| 回転可能結合数 | 0 |
| 重原子数 | 4 |
| 形式電荷 | 0 |
| 複雑度 | 26.3 |
| 融点 | 1704℃ |
| 溶解度 | insoluble in H2Osoluble in HF |
| 外観・状態 | 粉 |
| 色 | 白い |
| pH | pKa1= 9.65, pKa2 = 13.09(25℃) |
| 誘電率 | 2.0(Ambient) |
| InChI | 1S/H2O3Si/c1-4(2)3/h1-2H |
| InChIKey | IJKVHSBPTUYDLN-UHFFFAOYSA-N |
| SMILES | O[Si](O)=O |
| CAS データベース | 7699-41-4(CAS DataBase Reference) |
| EPAの化学物質情報 | Silicic acid (H2SiO3) (7699-41-4) |
化学的特性
Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder
安全性と法規制
| GHS 分類 | This chemical does not meet GHS hazard criteria for 4.8% (5 of 105) of reports.WarningH319 (90.5%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]P261, P264+P265, P271, P280, P304+P340, P305+P351+P338, P319, P337+P317, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 105 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies. |
|---|---|
| 規制情報 | Chemical: Silicic acid (H2SiO3)Silicic acid (H2SiO3): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right. |
| その他の安全情報 | IMAP assessments - Silicic acid (H2SiO3): Human health tier I assessment |
| Hazard Classes and Categories | Eye Irrit. 2 (90.5%) |
| 職業暴露区分（OEB） | B |
| 職業暴露限界（OEL） | TWA: 6.0 mg/m3 |
| 水環境危害等級（WGK） | 3 |
| TSCA 収載状態 | TSCA listed |
| RTECS 番号 | VV8853000 |
| 危険文句（R） | 36/37 |
| 危険表示 | Xi |
| 安全措置（S） | 22-26-36 |
| 危険等級 | Eye Irrit. 2STOT SE 3 |
| 貯蔵分類 | 11 - Combustible Solids |
用途
説明
Silicic acid is the general name that refers to the group of chemical compounds of the element hydrogen, silicon, and oxygen with the formula [SiOx(OH)4-2x]n. H4SiO4 is the most predominant form. Silicic acid is a hydrated form of silicon dioxide. It belongs to the family of Miscellaneous Silicates. These are inorganic compounds in which the largest metallic oxoanion is silicate, to which either no atom or a non metal atom is bonded. Silicic acid is contained in many foods, such as grain, fruit and vegetables (borage). It is commonly used in the manufacture of toothpastes and as a stationary phase for chromatography.It is utilized for the manufacture catalyst and catalyst carrier. It is involved in tungsten filament production as chemical reagent and flux. Further, it is used for oil and wax decoloring.
使用
Silicic acid is used in protein chromatography. Silicic acid has been used in a study to demonstrate the anti-biofilm potential of a glycolipid surfactant produced by a tropical marine strain of Serratia marcescens. Silicic acid has also been used to study the antioxidant activity of fresh and processed Jalapeno and Serrano peppers.