Trimethyl Orthoacetate
1,1,1-Trimethoxyethane
CAS: 1445-45-0
Molecular Formula: C5H12O3
Trimethyl Orthoacetate - Names and Identifiers
| Name | 1,1,1-Trimethoxyethane |
| Synonyms | TMOA CH3C(OCH3)3 trimethyl-acetate Methyl orthoacetate Trimethylorthoaceate 1,1,1-triethoxyethane 1,1,1-trimethoxy-ethan 1,1,1-Trimethoxyethane Trimethyl orthoacetate TRIMETHYL ORTHOACETATE Trimethyl Orthoacetate (TMOA) ORTHOACETIC ACID TRIMETHYL ESTER |
| CAS | 1445-45-0 |
| EINECS | 215-892-9 |
| InChI | InChI：1S/C5H12O3/c1-5(6-2,7-3)8-4/h1-4H3 |
| InChIKey | HDPNBNXLBDFELL-UHFFFAOYSA-N |
Trimethyl Orthoacetate - Physico-chemical Properties
| Molecular Formula | C5H12O3 |
| Molar Mass | 120.15 |
| Density | 0.944g/mLat 25°C(lit.) |
| Boling Point | 107-109°C(lit.) |
| Flash Point | 62°F |
| Water Solubility | HYDROLYSIS |
| Vapor Presure | 20 hPa (20 °C) |
| Appearance | Liquid |
| Specific Gravity | 0.960 (20/4℃) |
| Color | Clear colorless to slightly brown |
| BRN | 1098338 |
| Storage Condition | Store below +30°C. |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.388(lit.) |
| Physical and Chemical Properties |
|
| Use | Mainly as the production of pharmaceutical and pesticide chemical intermediates. For the synthesis of vitamin B1, vitamin A1, sulfamidine and other pharmaceutical intermediates, can also be used in dyes and spices industry. Pharmaceutical, home Chemical, can also be used in the dye and fragrance industry. Pharmaceutical, agricultural chemical, paint additives. |
Trimethyl Orthoacetate - Risk and Safety
| Risk Codes | R11 - Highly Flammable R43 - May cause sensitization by skin contact R38 - Irritating to the skin R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S37/39 - Wear suitable gloves and eye/face protection S24 - Avoid contact with skin. S33 - Take precautionary measures against static discharges. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S7/9 - |
| UN IDs | UN 3272 3/PG 2 |
| WGK Germany | 1 |
| TSCA | Yes |
| HS Code | 29159080 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Trimethyl Orthoacetate - Reference Information
| LogP | 1.13 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | trimethyl ortho-acetate is an important intermediate for the synthesis of methyl dichloro-urate. is used for the production of pharmaceutical, pesticide intermediates, but also the production of food additives, coatings, paints and other main raw materials. is used for the production of pharmaceutical, pesticide intermediates, but also the production of food additives, coatings, paints and other main raw materials, used as organic synthesis reagents. |
| production method | the preparation method is to add anhydrous acetonitrile, methanol and carbon tetrachloride in the reaction pot, cooling to -10 °c, with stirring, into the dry HCl gas, after passing the HCl, slowly warmed to 0~5 °c, continue to stir at this temperature for 12h, the reaction mixture of crude imino ether hydrochloride was neutralized with 28% sodium methoxide methanol solution to pH = 6.5, then added with pre-cooled methanol for alcoholysis, and the temperature was controlled at 5 ℃, then the temperature was raised to 35~40 ℃, the reaction was continued to stir for 10h, then cooled to 0~5 ℃, ammonium chloride was removed by Suction filtration, and the filtrate was neutralized with 28% sodium methoxide methanol solution to adjust pH = 8, then filtration, and then distillation, first remove the solvent carbon tetrachloride, and then collect 107~110 deg C fraction of trimethyl orthoacetate, the yield can reach 90%. |
Last Update：2024-04-09 20:49:11
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