Ethoxydichlorophosphine oxide
Ethyl dichlorophosphate
CAS: 1498-51-7
Molecular Formula: C2H5Cl2O2P
Ethoxydichlorophosphine oxide - Names and Identifiers
| Name | Ethyl dichlorophosphate |
| Synonyms | ethylesterdichlorid Phosphorodichloridate Ethyl dichlorophosphate Ethoxyphosphorylchloride Ethyl dichloridophosphate Ethyl dichlorophosphinate Ethyl phosphoric dichloride Ethyl phosphorodichloridate Ethoxyphosphoryl dichloride Ethoxydichlorophosphine oxide |
| CAS | 1498-51-7 |
| EINECS | 216-099-0 |
| InChI | InChI=1/C2H5Cl2O2P/c1-2-6-7(3,4)5/h2H2,1H3 |
Ethoxydichlorophosphine oxide - Physico-chemical Properties
| Molecular Formula | C2H5Cl2O2P |
| Molar Mass | 162.94 |
| Density | 1.373g/mLat 25°C(lit.) |
| Melting Point | -42.5 °C |
| Boling Point | 60-65°C10mm Hg(lit.) |
| Flash Point | >230°F |
| Vapor Presure | 0.886mmHg at 25°C |
| Appearance | Liquid |
| Color | Clear colorless to pale brown |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | n20/D 1.434(lit.) |
| Physical and Chemical Properties | This product is a colorless liquid, B. p.58 ~ 64 ℃/1.73~2.0kPa, the nature of this product is very active, and alcohol alcoholysis reaction, generating chlorinated alkanes and water. |
Ethoxydichlorophosphine oxide - Risk and Safety
| Risk Codes | R26 - Very Toxic by inhalation R34 - Causes burns R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 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 3390 6.1/PG 1 |
| WGK Germany | 3 |
| RTECS | TD4390000 |
| HS Code | 29209090 |
| Hazard Class | 8 |
| Packing Group | III |
Ethoxydichlorophosphine oxide - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | O-ethylphosphoroyl dichloride is used in pesticides to prepare nematicides such as streptocidal phosphorus, benzenophos and fungicides diphemp. |
| Production method | O-ethylphosphoryl dichloride is prepared by direct reaction of phosphorus oxychloride and absolute ethanol. Under the conditions of stirring and cooling, absolute ethanol is added dropwise to equimolar phosphorus oxychloride, the dropwise temperature is controlled at about 40 ℃, the reaction is continued for 4 hours after dripping, and hydrochloric acid gas is extracted while stirring. The yield of the obtained product is about 90%, and the content is above 91%. Due to the strong activity of the reaction product, it is easy to hydrolyze or alcoholysis when exposed to water or alcohol at room temperature to generate corresponding by-products. If the HCl produced by the reaction is not discharged in time, side reactions will also occur when it is in contact with the raw material ethanol for a long time. In order to reduce the occurrence of these side reactions, the following measures are often taken in the process: ① the raw materials and reaction system used must be anhydrous, and the reaction is required to be carried out at low temperature (below O ℃) and under micro pressure; ② phosphorus oxychloride is generally 30% ~ 150% in excess, and sometimes a certain amount of xylene is added as diluent, which is conducive to the diffusion of heat, it also prevents the formation of by-products such as diesters and triesters; ③ After the reaction, it is desoluted under vacuum conditions (usually at 2.66kPa), and excess phosphorus oxychloride is recovered. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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