Substance profile
Triazophos
Triazophos is a yellowish-brown oil.
01 · Identification
What Triazophos is
Triazophos is a yellowish-brown oil. Its molecular formula is C12H16N3O3PS and its molecular weight is 313.31 g/mol. It boils at 350 °C, melts at 5 °C, is soluble in water.
Under the GHS it carries the signal word Danger.
Other names for Triazophos
- triazophos (ISO)
- O,O-diethyl-O-1-phenyl-1H-1,2,4-triazol-3-yl phosphorothioate
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 |
|---|---|
| H331 | Toxic if inhaled. |
| H301 | Toxic if swallowed. |
| H312 | Harmful in contact with skin. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P271, P273, P280, P301, P302, P304, P310, P312, P330, P352, P391, P501
03 · Physical and chemical properties
Triazophos 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 | 350 °C (662 °F) | at 760 mmHg | DOE PAC |
| Decomposes on distillation | decomposes | HSDB | |
| Decomposes before boiling (EPA, 1998) | decomposes | CAMEO | |
| Melting point | 5 °C (41 °F) | HSDB | |
| 2.5 °C (36.5 °F) | range, midpoint shown | CAMEO | |
| Density | 1.2514 g/cm³ | at 20 °C | HSDB |
| 1.247 g/cm³ | at 20 °C | CAMEO | |
| 1.25 g/cm³ | at 20 °C | DOE PAC | |
| Solubility | Soluble in organic solvents | HSDB | |
| In water, 39 mg/L at 20 °C | at 20 °C | HSDB | |
| In water, 24.7 mg/L at 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 0.00001 mmHg | CAMEO | |
| 0.00001 mmHg | at 25 °C | DOE PAC | |
| 0.0000029 mmHg | at 30 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Triazophos
Reactivity
Organophosphates, such as TRIAZOFOS, 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 Triazophos in the storage compatibility matrix →