A7727912
Tetraethyl orthosilicate , Reagent level, 98% , 78-10-4
Synonym(s):
TEOS;Tetraethyl orthosilicate;Tetraethoxysilane;Tetraethyl silicate;Tetraethoxysilicon(IV)
CAS NO.：78-10-4
Empirical Formula: C8H20O4Si
Molecular Weight: 208.33
MDL number: MFCD00009062
EINECS: 201-083-8
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | -77 °C |
| Boiling point: | 168 °C(lit.) |
| Density | 0.933 g/mL at 20 °C(lit.) |
| vapor density | 7.2 (vs air) |
| vapor pressure | <1 mm Hg ( 20 °C) |
| refractive index | n |
| Flash point: | 116 °F |
| storage temp. | Store below +30°C. |
| solubility | Soluble in ethanol and 2-propanol. |
| form | Liquid |
| color | Colorless |
| Specific Gravity | 0.934 |
| PH | 7 (20°C) |
| explosive limit | 1.3-23%(V) |
| Water Solubility | Hydrolysis |
| FreezingPoint | -77℃ |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| Sensitive | Moisture Sensitive |
| Merck | 14,3851 |
| BRN | 1422225 |
| Henry's Law Constant | 4.9×10-1 mol/(m3Pa) at 25℃, HSDB (2015) |
| Dielectric constant | 4.1（20℃） |
| Exposure limits | ACGIH:TLV-TWA 10 ppm (85 mg/m3) OSHA:PEL-TWA 100 ppm (850 mg/m3) NIOSH:REL-TWA 10 ppm |
| Stability: | Stable. Flammable. Incompatible with strong oxidizing agents, water, alkalies, mineral acids. |
| InChI | 1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3 |
| InChIKey | BOTDANWDWHJENH-UHFFFAOYSA-N |
| SMILES | CCO[Si](OCC)(OCC)OCC |
| CAS DataBase Reference | 78-10-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Silicic acid (H4sio4), tetraethyl ester(78-10-4) |
| EPA Substance Registry System | Tetraethyl silicate (78-10-4) |
Description and Uses
Tetraethyl Orthosilicate is used in the preparation of antidreflective coatings on silicate glass via silicon dioxide. Crosslinking reagent.
Safety
| Symbol(GHS) |    GHS02,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H332-H315-H319-H370-H372-H373-H335-H336-H226 |
| Precautionary statements | P501-P260-P270-P240-P210-P233-P243-P241-P242-P271-P264-P280-P370+P378-P337+P313-P305+P351+P338-P308+P311-P362+P364-P303+P361+P353-P332+P313-P304+P340+P312-P403+P233-P403+P235-P405 |
| target organs | Respiratory system |
| PPE | Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter |
| Hazard Codes | Xn |
| Risk Statements | 10-20-36/37-36/37/38 |
| Safety Statements | 16-36/37/39-26-24/25 |
| RIDADR | UN 1292 |
| OEB | A |
| OEL | TWA: 10 ppm (85 mg/m3) |
| WGK Germany | 1 |
| RTECS | VV9450000 |
| Autoignition Temperature | 230 °C |
| TSCA | TSCA listed |
| HS Code | 2920 90 70 |
| HazardClass | 3 |
| PackingGroup | III |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Acute Tox. 4 Inhalation Eye Irrit. 2 Flam. Liq. 3 STOT SE 3 |
| Hazardous Substances Data | 78-10-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 6270 mg/kg LD50 dermal Rabbit 5860 mg/kg |
| IDLA | 700 ppm |
| REACH Registrations | Active |
| Limited Quantities | 5.0 L (1.3 gallons) (liquid) |
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L) |
