298-07-7
Di(2-ethylhexyl)phosphate
CAS: 298-07-7
Molecular Formula: C16H35O4P
298-07-7 - Names and Identifiers
| Name | Di(2-ethylhexyl)phosphate |
| Synonyms | p204 Di(isooctyl) phosphate Di(2-ethylhexyl)phosphate Bis(2-Ethylhexyl) Phosphate 2-ethylhexyl hydrogen phosphate Di(2-ethylhexyl)phosphoric acid ammonium bis(2-ethylhexyl) phosphate Potassium bis(2-ethylhexyl) phosphate |
| CAS | 298-07-7 |
| EINECS | 206-056-4 |
| InChI | InChI=1/C8H19O4P/c1-3-5-6-8(4-2)7-12-13(9,10)11/h8H,3-7H2,1-2H3,(H2,9,10,11)/p-1 |
298-07-7 - Physico-chemical Properties
| Molecular Formula | C16H35O4P |
| Molar Mass | 322.48 |
| Melting Point | -60℃ |
| Boling Point | 321.793°C at 760 mmHg |
| Flash Point | 148.416°C |
| Water Solubility | slightly soluble |
| Vapor Presure | 0mmHg at 25°C |
| Physical and Chemical Properties | A colorless, transparent, and more viscous liquid. Freezing point -60 ℃, relative density 0.973(25/25 ℃), refractive index 1.4420(25 ℃), boiling point 209 ℃(1.33kPa). flash point 196 °c solubility: soluble in common organic solvents and alkalis, insoluble in water. |
| Use | Solvents, the role of rare earth metal extractants, wetting agents and surfactants of raw materials, plastics plasticizers. The product has moderate toxicity, eye, skin and mucous membrane irritation. |
298-07-7 - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R21 - Harmful in contact with skin R34 - Causes burns |
| Safety Description | S25 - Avoid contact with eyes. 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 1902 |
298-07-7 - Upstream Downstream Industry
| Raw Materials | 1-Octanol 2-Ethylhexanol Octanoyl chloride |
| Downstream Products | Hydrogen peroxide |
298-07-7 - Uses and synthesis methods
production method
The esterification reaction of 2-ethylhexanol and phosphorus oxychloride produces diisooctyl phosphate chloride. The acid chloride is hydrolyzed with lye to obtain sodium salt, which is obtained by acidification with sulfuric acid. 1. Esterification is carried out in a glass-lined reaction pot. Phosphorus oxychloride is first added, stirred and cooled, 2-ethyl n-alcohol is added dropwise below 10 ℃, stirring is continued for 1h after adding, slowly heating to 20-45 ℃ to discharge hydrogen chloride for 3h, then heating to 45-50 ℃, pumping hydrogen chloride gas with water jet pump for 3h, finally heating to 50-60 ℃, and discharging hydrogen chloride gas. 2. Hydrolysis Add 20% liquid alkali into the hydrolysis pot, stir, add the above esterification product dropwise below 60 ℃, raise the temperature to 80-90 ℃, keep the temperature for 1h, let stand for 15min, and release the lower wastewater. 30% liquid alkali is added under stirring, heated to 120 ℃, refluxed for 1h, let stand for 15min, and the lower lye is released for recovery. The materials in the hydrolysis pot are washed with 3% alkaline water at 80-90 ℃ for acidification. 3. Acidified hydrolysate is added with 10% sulfuric acid to acidify at a temperature of 50-60 ℃, acidify for 1h, and the lower waste acid water is removed. Wash with water. Finally, heat to 110-120 ℃ in the film separation tower to remove water and low boiling matter to obtain the finished product. Industrial purity ≥ 90%. Raw material consumption quota: 2-ethylhexanol 1100kg/t, phosphorus oxychloride 590kg/t.
category
toxic substances
toxicity classification
Poisoning
acute toxicity
oral-rat LD50: 4940 mg/kg; Abdominal-mouse LDL0: 62.5 mg/kg
stimulus data
skin-rabbit 500 mg moderate; eyes-rabbit 0.25 mg/24 hours severe
explosive hazard characteristics
A corrosive object; strong irritation to eyes and skin
flammability hazard characteristics
Combustible; thermal decomposition of toxic phosphorus oxide smoke
storage and transportation features
Warehouse ventilation and low temperature drying
fire extinguishing agent
Carbon dioxide, sand, water, foam
Last Update：2024-04-10 22:29:15
298-07-7 - Security information
| WGK Germany | 1 |
| RTECS number | TB7875000 |
| auto-ignition temperature | 255 °C |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| customs code | 29190090 |
| toxic substance data | 298-07-7(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 4940 mg/kg LD50 dermal Rabbit 1250 mg/kg |
Last Update：2024-04-10 22:29:15
298-07-7 - Nature
| storage conditions | Store below 30°C. |
| solubility | ethanol: soluble100mg/mL, clear |
| acidity coefficient (pKa) | 1.47±0.50(Predicted) |
| morphology | Liquid |
| color | Colorless |
| Specific gravity | 0.974 |
| PH value | 3 (< 1g/l, H2O) |
| water solubility | slightly soluble |
| freezing point | -60℃ |
| BRN | 1712988 |
| InChIKey | SEGLCEQVOFDUPX-UHFFFAOYSA-N |
| NIST chemical information | Bis(2-ethylhexyl)hydrogen phosphate(298-07-7) |
| EPA chemical information | Bis(2-ethylhexyl) phosphate (298-07-7) |
Last Update：2024-04-09 21:04:16
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View History
298-07-7
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Raw Materials for 298-07-7
Downstream Products for 298-07-7