-
-
在线客服
-
-
-
-
我的收藏
-
我的订单
-
快速订购
-
-
-
| 别名: | [TEOS], 四乙氧基硅烷, 原硅酸四乙酯 | ||
|---|---|---|---|
| Cas号: | 78-10-4 | 物化性质: | |
| 分子式: | C8H20O4Si | 熔点: | -82°C |
| 分子量: | 208.33 | 沸点: | 168 °C(lit.) |
| EINECS编号: | 201-083-8 | 密度: | 0.933 g/mL at 20 °C(lit.) |
| MDL号: | MFCD00009062 | 储存条件: | 室温 |
| 技术规格说明书 中文版MSDS 英文版MSDS | |||
|
| 货号 | 规格 | 可用库存 | 销售价(RMB) | 您的折扣价(RMB) | 数量 | 加入购物车 |
|---|---|---|---|---|---|---|
| T819506-25ml | ≥99.999% metals basis | 上海：- 山东：现货 广东：- 重庆：- 河北：- |
315.00 | 加入购物车 | ||
| T819506-100ml | ≥99.999% metals basis | 上海：- 山东：现货 广东：- 重庆：- 河北：- |
945.00 | 加入购物车 | ||
| T819506-500ml | ≥99.999% metals basis | 上海：- 山东：现货 广东：- 重庆：- 河北：- |
3,598.00 | 加入购物车 |
| 折光率: | n20/D 1.382(lit.) |
|---|---|
| 熔点: | -82°C |
| 沸点: | 168 °C(lit.) |
| 密度: | 0.933 g/mL at 20 °C(lit.) |
| 闪点: | 45 °C |
| 储存条件: | 室温 |
| 颜色: | 无色液体 |
| 产品描述: | Tetraethyl orthosilicate (TEOS) is an ester of orthosilicic acid, which exists in small amounts in nature wherever silica is in contact with water. The ester is also known by several other names, including ethyl silicate (which is somewhat ambiguous), silicon tetraethoxide, and tetraethoxysilane. In a landmark paper published in 1928, A. W. Dearing and E. Emmet Reid* at Johns Hopkins University (Baltimore) reported improved syntheses of various alkyl orthosilicates. TEOS was obtained in 70% yield by slowly adding silicon tetrachloride (SiCl4) to cold anhydrous ethanol, followed by removing byproduct hydrogen chloride with a stream of dry air. The reaction system must be rigorously free of water because even though TEOS is only slightly soluble in water, it hydrolyzes to form silica and ethanol. The reaction is the basis of modern TEOS production. TEOS has multiple specialty uses, including stone hardening (which arrests the decay of structures and art objects), mortar and cement manufacture, and cross-linking silicone polymers. Its 2020 global market is valued at US$245 million for an estimated production of ≈120,000 t. |
