Substance profile
Terbufos
Terbufos is a slightly yellowish liquid with a mercaptan-like odor.
01 · Identification
What Terbufos is
Terbufos is a slightly yellowish liquid with a mercaptan-like odor. Its molecular formula is C9H21O2PS3 and its molecular weight is 288.4 g/mol. It boils at 68.9 °C, melts at -29 °C.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 2nd degree.
Other names for Terbufos
- terbufos (ISO)
- S-tert-butylthiomethyl O,O-diethylphosphorodithioate
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 |
|---|---|
| H310 | Fatal in contact with skin. |
| H300 | Fatal if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P270, P273, P280, P301, P302, P310, P330, P352, P391, P501
03 · Physical and chemical properties
Terbufos 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 | 68.9 °C (156 °F) | ICSC | |
| 315 °C (599 °F) | at 760 mmHg | DOE PAC | |
| 69 °C (156.2 °F) | at 0.01 mmHg (reduced pressure) | HSDB | |
| Melting point | -29 °C (-20.2 °F) | HSDB | |
| -29.22 °C (-20.6 °F) | CAMEO | ||
| -29.2 °C (-20.6 °F) | ICSC | ||
| Density | 1.1 g/cm³ | ICSC | |
| 1.105 g/cm³ | at 24 °C | HSDB | |
| Solubility | Readily soluble in most organic solvents: aromatic hydrocarbons, chlorinated hydrocarbons, alcohols, acetone | HSDB | |
| Insoluble (<1 mg/ml) (NTP, 1992) | CAMEO | ||
| In water, 5.07 mg/l @ 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.00032 mmHg | HSDB | |
| 0.0003 mmHg | at 25 °C | CAMEO | |
| Flash point | 88 °C (190.4 °F) | Technical terbufos | HSDB |
| 87.78 °C (190 °F) | CAMEO | ||
| 87.8 °C (190 °F) | ICSC | ||
| Corrosivity | Non-corrosive to metals. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Terbufos
Storage conditions
You should store this chemical in a freezer and away from all mineral acids and bases.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Organothiophosphates, such as TERBUFOS, 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. This compound decomposes in the presence of acids or bases (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Terbufos in the storage compatibility matrix →