762-04-9
Diethyl phosphite
CAS: 762-04-9
Molecular Formula: C4H11O3P
762-04-9 - Names and Identifiers
762-04-9 - Physico-chemical Properties
| Molecular Formula | C4H11O3P |
| Molar Mass | 138.1 |
| Density | 1.072 g/mL at 25 °C (lit.) |
| Melting Point | -70 °C |
| Boling Point | 50-51 °C/2 mmHg (lit.) |
| Flash Point | 180°F |
| Water Solubility | miscible (hydrolysis) |
| Vapor Presure | 7hPa at 20℃ |
| Appearance | Liquid |
| Specific Gravity | 1.072 |
| Color | Colorless |
| BRN | 605759 |
| Stability | Stable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, strong bases. May decompose on exposure to moisture. Combustible. |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.407(lit.) |
| Physical and Chemical Properties | Boiling Point 187~188 ℃ relative density 1.072g/cm3 refractive index 1.4080 flash point 90 ℃ soluble in ethanol, ether and other organic solvents. |
| Use | Is an intermediate in the preparation of organic phosphorus compounds, also as an extractant |
762-04-9 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R43 - May cause sensitization by skin contact |
| Safety Description | 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. S37/39 - Wear suitable gloves and eye/face protection S28 - After contact with skin, wash immediately with plenty of soap-suds. S27 - Take off immediately all contaminated clothing. |
| WGK Germany | 1 |
| RTECS | TG7875000 |
| FLUKA BRAND F CODES | 10-13-21 |
| TSCA | Yes |
| HS Code | 29209014 |
762-04-9 - Reference Information
| LogP | -0.15 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | O,O '-diethylphosphite (diethyl phosphite) is a fungicide, aluminum triethylphosphonate, rice blast, insecticide, the intermediate of herbicide glyphosate, the intermediate O,O diethyl phosphoryl chloride was synthesized, and then the insecticide thiocyclic phosphorus was synthesized; The intermediate O,O-diethyl Thio (alcohol) sodium phosphate was synthesized, and then the fungicide rice blast net was synthesized. This product can also be used as extractant and phosphate ester intermediates. used as an extractant and an intermediate of phosphoric acid ester. For the preparation of diethyl phosphate, O,O-diethyl-S-benzyl phosphorothioate, Rice blast net. This is the first variety of organic phosphorus fungicides put into large-scale production. It is used to replace the Mercury agent to control rice blast, and also has a certain effect on the prevention and control of rice small grain sclerotium disease, sheath blight and leaf blight. is an intermediate for the preparation of organophosphorus compounds, also as extractant purposes: can be used as extractant, phosphate ester intermediates. For the synthesis of pesticide rice blast, triethylphosphonic acid aluminum and synthesis of O,O-diethyl phosphorus oxychloride. It can also be used to synthesize plasticizers, flame retardants, etc. is an intermediate in the preparation of organophosphorus compounds, also used as extractant |
| production method | is obtained by reacting ethanol with phosphorus trichloride. its laboratory method is to add 75ml of carbon tetrachloride and 82.8g(1.8mol) of anhydrous ethanol into the reaction bottle, under the protection of nitrogen and stirring, 70.2g(0.51 mol) of phosphorus trichloride solution dissolved in 50ml of carbon tetrachloride was added dropwise, and the temperature was increased during the whole process, after the addition, the temperature was raised to 70 ° C. For 1H, the solution changed from colorless to light yellow, and then the solvent was distilled off under reduced pressure with a water pump, and the product was distilled off under reduced pressure with an oil pump. 3C2H5OH PCl3 →(C2H5O)2PHO C2H5Cl 2HCl its industrial process is in the enamel stirred tank, adding anhydrous ethanol, benzene, cooling and stirring, at 10~20 ℃ Dropwise adding phosphorus trichloride, after the dropwise addition is completed within 1H, the reaction is carried out for 1H at this temperature, the reaction material is transferred to the enamel neutralization kettle, and neutralized with ammonia gas at 10~20 ℃ to pH = 6~7, and ammonium chloride is filtered off, the filtrate was distilled off first, and then O,O′-diethylphosphite was distilled off under reduced pressure. |
| 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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