791-28-6
Triphenylphosphine oxide
CAS: 791-28-6
Molecular Formula: C18H15OP
791-28-6 - Names and Identifiers
| Name | Triphenylphosphine oxide |
| Synonyms | Ph3PO Orlistat USP RC C Triphenylphosphan-oxid Triphenylphosphineoxide Triphenylphosphine oxide triphenylphosphane oxide Triphenylphosphoniumolate Trisphenylphosphine oxide phosphorane, triphenyl-, oxide Triphenylphosphine oxide(TPPO) phosphorus(1+), hydroxytriphenyl-, inner salt Orlistat USP Related Compound C (Triphenylphosphine Oxide) Orlistat Related Compound C (25 mg) (Triphenylphosphine oxide) |
| CAS | 791-28-6 |
| EINECS | 212-338-8 |
| InChI | InChI=1/C18H15OP/c19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18/h1-15H |
791-28-6 - Physico-chemical Properties
| Molecular Formula | C18H15OP |
| Molar Mass | 278.28 |
| Density | 1,212 g/cm3 |
| Melting Point | 150-157°C(lit.) |
| Boling Point | 360 °C |
| Flash Point | 180 °C |
| Water Solubility | slightly soluble |
| Solubility | Insoluble in water |
| Vapor Presure | <1 hPa (50 °C) |
| Appearance | White, crystalline |
| Specific Gravity | 1.212 |
| Color | White to pink-brown |
| BRN | 745854 |
| Storage Condition | Store below +30°C. |
| Sensitive | 4: no reaction with water under neutral conditions |
| Refractive Index | 1.619 |
| MDL | MFCD00002080 |
| Physical and Chemical Properties | Melting point 154-158°C boiling point 360°C flash point 180°C water-soluble easily soluble |
| Use | For fluorescent anti-counterfeit powder |
791-28-6 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36 - Wear suitable protective clothing. |
| UN IDs | 3077 |
| WGK Germany | 2 |
| RTECS | SZ1676000 |
| TSCA | Yes |
| HS Code | 29310095 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 685 mg/kg |
791-28-6 - Reference Information
| LogP | 2.8 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| structural characteristics | both Ph3PO and similar POCl3 have tetrahedral structure, and the oxygen atom is basic. Both the rigidity of the skeleton and the basicity of the oxygen atom cause triphenylphosphine oxide to induce crystallization of compounds which are difficult to crystallize by other methods, and are particularly effective for acidic hydrogen-containing substances such as phenol. |
| preparation method | many reactions in organic synthesis, such as Wittig, Staudinger and photo-extension reactions, can produce Ph3PO by-products, ph3PCl2 also produces triphenylphosphine oxide in the conversion of alcohols to chlorinated hydrocarbons: Ph3PCl2 ROH → Ph3PO HCl RCl |
| Application | triphenylphosphine oxide can be used as organic synthesis and pharmaceutical intermediates, catalysts, extractants, etc., and also used for fluorescent anti-counterfeiting powder. This product is mainly used as solvent, Catalyst, corrosion inhibitor; Also used for rubber accelerator and other fine chemicals synthesis, also used as polyurethane catalyst, the synthesis of aminobenzylpenicillin and hydroxybenzyl penicillin catalyst. N-methyl morpholine oxide can be produced by oxidation with hydrogen peroxide. |
| autoignition temperature | 590°C |
Last Update：2024-04-09 20:52:54
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