ETHANEPHOSPHONIC ACID
Ethanephosphonic acid
CAS: 6779-09-5
Molecular Formula: C2H7O3P
ETHANEPHOSPHONIC ACID - Names and Identifiers
| Name | Ethanephosphonic acid |
| Synonyms | ethylphosphonate Ethyl-phosphonate Ethylphosphonic acid ETHYLPHOSPHONIC ACID ETHANEPHOSPHONIC ACID Ethanephosphonic acid 4-Ethylphosphonic Acid Phosphonic acid, P-ethyl- ethoxy(hydroxy)oxophosphonium Ethylphosphonic acid Solution, 100ppm |
| CAS | 6779-09-5 |
| EINECS | 229-839-2 |
| InChI | InChI=1/C2H7O3P/c1-2-6(3,4)5/h2H2,1H3,(H2,3,4,5)/p-2 |
ETHANEPHOSPHONIC ACID - Physico-chemical Properties
| Molecular Formula | C2H7O3P |
| Molar Mass | 110.05 |
| Melting Point | 61-63 °C (lit.) |
| Boling Point | 330-340℃ (8 Torr) |
| Flash Point | 111.3°C |
| Water Solubility | Soluble in water. |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.00365mmHg at 25°C |
| Appearance | Solid |
| Color | Off-White to Pale Yellow |
| BRN | 1743032 |
| pKa | pK1:2.43;pK2:8.05 (25°C) |
| Storage Condition | Hygroscopic, -20°C Freezer, Under inert atmosphere |
| Stability | Stable. Incompatible with strong oxidizing agents, strong bases. |
| Sensitive | Moisture Sensitive |
| Physical and Chemical Properties | This product is a colorless transparent liquid. |
ETHANEPHOSPHONIC ACID - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S28 - After contact with skin, wash immediately with plenty of soap-suds. 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.) |
| UN IDs | UN 3261 8/PG 2 |
| WGK Germany | 3 |
| Hazard Class | 8 |
| Packing Group | III |
ETHANEPHOSPHONIC ACID - Reference Information
| Use | The pesticide is used for the synthesis of the fungicide aluminum triethylphosphonate (aluminum ethylphosphonate). |
| production method | the preparation method is the reaction of phosphorus trichloride and ethanol in the presence of water, A mixture of diethyl phosphite and monoethyl phosphite was prepared. Ammonia or sodium hydroxide was then added to convert both to salts. This salt is reacted with a slight excess of aluminum sulfate to give the bactericide aluminum triethylphosphonate. Specific Process: alcohol and water are mixed and cooled to about 10 ℃, and phosphorus trichloride is added dropwise under reduced pressure to keep the temperature at about 30 ℃; After the dropwise addition is completed, the mixture is stirred for 15min, then increase the vacuum to 97 ~ 99kPa, with boiling water heated to 80~85 ℃, and then cooled to 5 ℃, neutralized with about 10% ammonia, then add an excess of 5% ammonia water below 30 ℃ (constant concentration); Stop stirring after adding, stand at 40~45 ℃ for 2H, and dehydrate at 87~93kPa, when the liquid temperature reached 80 ° C., the product monoethyl phosphite was obtained. |
Last Update：2024-04-09 15:16:52
