Tetramethyl orthosilicate
Tetramethyl orthosilicate
CAS: 681-84-5
Molecular Formula: C4H12O4Si
Tetramethyl orthosilicate - Names and Identifiers
| Name | Tetramethyl orthosilicate |
| Synonyms | Dynasil M DYNASIL M Methyl silicate Tetramethoxysilane methylorthosilicate dimethoxy(oxo)silane Methyl orthosilicate Silicon tetramethoxide methylsilicate[(meo)4si] Tetramethyl orthosilicate Methyl silicate ((MeO)4Si) methylsilicate((ch3)4sio4) Methyl silicate ((CH3)4SiO4) methylesterofortho-silicicaci Tetramethoxysilanecolorlessliq |
| CAS | 681-84-5 |
| EINECS | 211-656-4 |
| InChI | InChI=1/C2H6O3Si/c1-4-6(3)5-2/h1-2H3 |
| InChIKey | LFQCEHFDDXELDD-UHFFFAOYSA-N |
Tetramethyl orthosilicate - Physico-chemical Properties
| Molecular Formula | C4H12O4Si |
| Molar Mass | 152.22 |
| Density | 1.023g/mLat 25°C(lit.) |
| Melting Point | −4°C(lit.) |
| Boling Point | 121-122°C(lit.) |
| Flash Point | 84°F |
| Water Solubility | hydrolysis |
| Vapor Presure | 3.35 psi ( 20 °C) |
| Vapor Density | 5.25 (vs air) |
| Appearance | liquid |
| Specific Gravity | 1.032 |
| Color | colorless |
| BRN | 1699658 |
| Storage Condition | Store below +30°C. |
| Sensitive | 7: reacts slowly with moisture/water |
| Explosive Limit | 0.88-23.8%(V) |
| Refractive Index | n20/D 1.368(lit.) |
| Physical and Chemical Properties | Density 1.023 melting point -2°C boiling point 121-122°C refractive index 1.367-1.37 flash point 26°C water-soluble hydrogen |
| Use | It is used in the production of heat-resistant and chemical-resistant coatings, silicone solvents and adhesives for precision casting, and is also a widely used intermediate for organic synthesis. |
Tetramethyl orthosilicate - Risk and Safety
| Hazard Symbols | T+ - Very toxic |
| Risk Codes | R10 - Flammable R26 - Very Toxic by inhalation R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S28A - |
| UN IDs | UN 2606 6.1/PG 1 |
| WGK Germany | 3 |
| RTECS | VV9800000 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 29209085 |
| Hazard Class | 6.1 |
| Packing Group | I |
Tetramethyl orthosilicate - Reference Information
Open Data Unverified Data
| FEMA | 3185 | METHYLATED SILICA |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | synthetic silicone used as insulating material, optical glass processing agent and coagulant in electronic industry. Manufacture of heat-resistant paint. Adhesive. methyl orthosilicate can be used to produce heat-resistant and chemical-resistant coatings, silicone solvents and adhesives for precision casting, etc., and is also a widely used organic synthesis intermediate to synthesize other silane products, it is used in the production of heat-resistant coatings, chemical-resistant coatings, silicone solvents and adhesives for precision casting. It is used as a cross-linking component in silicone adhesives and sealants. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LDL0: 700 mg/kg; Intraperitoneal-mouse LD50: 250 mg/kg |
| stimulation data | eyes-rabbit 250 μg severe |
| flammability hazard characteristics | reaction with oxidant |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidants and food additives |
| extinguishing agent | dry powder, foam, carbon dioxide, sand. |
| Occupational Standard | TWA 30 mg/m3; Tel 60 mg/m3 |
| spontaneous combustion temperature | 245°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:43:38
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