Substance profile
Triphenyl phosphite
Triphenyl phosphite is a water-white to pale yellow solid or oily liquid with a pleasant odor.
01 · Identification
What Triphenyl phosphite is
Triphenyl phosphite is a water-white to pale yellow solid or oily liquid with a pleasant odor. Its molecular formula is C18H15O3P and its molecular weight is 310.3 g/mol. It boils at 360 °C, melts at 25 °C.
Under the GHS it carries the signal word Warning.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P264, P273, P280, P302, P305, P313, P332, P337, P338, P352, P391, P501
03 · Physical and chemical properties
Triphenyl phosphite properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 360 °C (680 °F) | HSDB | |
| 360 °C (680 °F) | at 760 mmHg | CAMEO | |
| Melting point | 25 °C (77 °F) | HSDB | |
| 23.06 °C (73.5 °F) | range, midpoint shown | CAMEO | |
| 23.5 °C (74.3 °F) | range, midpoint shown | ICSC | |
| Density | 1.18 g/cm³ | ICSC | |
| 1.1842 g/cm³ | at 20 °C | HSDB | |
| 1.1844 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Insoluble in water. Very soluble in ethanol, organic solvents. | HSDB | |
| Solubility in water: none | ICSC | ||
| less than 0.1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO | |
| Flash point | 218.33 °C (425 °F) | HSDB | |
| 218 °C (424.4 °F) | ICSC | ||
| Vapor density | 1 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Triphenyl phosphite
Reactivity
Organophosphates, such as TRIPHENYL PHOSPHITE, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Triphenyl phosphite in the storage compatibility matrix →