78-09-1
Tetraethyl orthocarbonate
CAS: 78-09-1
Molecular Formula: C9H20O4
78-09-1 - Names and Identifiers
| Name | Tetraethyl orthocarbonate |
| Synonyms | TETRAETHOXYMETHANE Tetraethoxymethane Ethane, 1,1‘,1‘‘,1‘‘‘- Tetraehtylorthocarbonate Tetraethylorthocarbonate (triethoxymethoxy)ethane TETRAETHYL ORTHOCARBONATE Tetraethyl orthocarbonate 1-(Triethoxymethoxy)ethane ORTHOCARBONIC ACID TETRAETHYL ESTER [methanetetrayltetrakis(oxy)]tetrakis- 1,1',1'',1'''-[methanetetrayltetrakis(oxy)]tetrakis-ethan |
| CAS | 78-09-1 |
| EINECS | 201-082-2 |
| InChI | InChI=1/C9H20O4/c1-5-10-9(11-6-2,12-7-3)13-8-4/h5-8H2,1-4H3 |
78-09-1 - Physico-chemical Properties
| Molecular Formula | C9H20O4 |
| Molar Mass | 192.25 |
| Density | 0.919 g/mL at 25 °C (lit.) |
| Melting Point | 222 °C |
| Boling Point | 159 °C (lit.) |
| Flash Point | 127°F |
| Water Solubility | Insoluble |
| Vapor Presure | 3.24mmHg at 25°C |
| Appearance | clear liquid |
| Specific Gravity | 0.919 |
| Color | Colorless to Almost colorless |
| BRN | 1747401 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.392(lit.) |
| Physical and Chemical Properties | Colorless liquid. The relative density is 0.919g/ml, the flash point is -24 ℃, the boiling point is 158-161 ℃, and the refractive index is 1.3930. |
| Use | Mainly used in the synthesis of pharmaceutical intermediates and adhesives |
78-09-1 - Risk and Safety
| Risk Codes | R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. |
| UN IDs | UN 3272 3/PG 3 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 21 |
| HS Code | 29209010 |
| Hazard Class | 3 |
| Packing Group | III |
78-09-1 - Nature
Open Data Verified Data
colorless flammable liquid, irritating odor, relative density of 0.9356. Boiling point 168.1 °c. Melting point 110 °c (sublimation). Vapor pressure (20 °c) 133. Flash point (Open Cup) 51. 67 °c. Freezing point -77 °c. Viscosity (20 ℃)17. 9mPa.s, insoluble in water, soluble in ethanol, slightly soluble in benzene. Hydrolysis to produce an adhesive of silica.
Last Update：2024-01-02 23:10:35
78-09-1 - Preparation Method
Open Data Verified Data
The esterification reaction was carried out using silicon tetrachloride and anhydrous ethanol as raw materials at a ratio of 1:1.2 in terms of the amount ratio of the substances at normal temperature and normal pressure. The reaction product is distilled at a temperature above 150 ° C. To remove hydrogen chloride gas from the feed solution, and excess ethanol is distilled off, then cooled, decolorized and filtered to obtain the product.
Last Update：2022-01-01 10:54:21
78-09-1 - Use
Open Data Verified Data
tetraethoxysilane is mainly used in the manufacture of chemical-resistant coatings and heat-resistant coatings, silicone solvents and precision casting adhesives. After complete hydrolysis, it produces very fine silicon oxide powder, which is used to make the fluorescent powder.
Last Update：2022-01-01 10:54:20
78-09-1 - Safety
Open Data Verified Data
- This product has low toxicity, and has a strong stimulating effect on the respiratory tract and eyes. The maximum allowable concentration in air is 850mg/m3. The production site to prevent dust flying, the operator should wear protective equipment.
- sealed and packaged in glass bottles and externally reinforced with wooden boxes. The goods shall be stored in a warehouse and transported in accordance with the provisions of the railway Risk Regulation No. 84064.
Last Update：2022-01-01 10:54:21
78-09-1 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | mainly used in the synthesis of pharmaceutical intermediates and adhesives |
| production method | 1. Preparation by reaction of sodium ethoxide with trichloronitromethane. Its homolog propylcarbonate [propyl orthocarbon-ate,C(OC3H7)4] had a boiling point of 224 °c; And butyl procarbonate [butyl orthocar-bonate,C(C4H9)4] had a boiling point of 245 °c. |
Last Update：2024-04-10 22:29:15
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