Substance profile
Sulfotep
Sulfotep is a colorless oil with a possesses a garlic odor.
01 · Identification
What Sulfotep is
Sulfotep is a colorless oil with a possesses a garlic odor. Its molecular formula is C8H20O5P2S2 and its molecular weight is 322.3 g/mol. It boils at 310 °C, melts at 88 °C, is miscible with water.
Under the GHS it carries the signal word Danger.
Other names for Sulfotep
- sulfotep (ISO)
- O,O,O,O-tetraethyl dithiopyrophosphate
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
Sulfotep 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 | 310 °C (590 °F) | at 760 mmHg | DOE PAC |
| 137.5 °C (279.5 °F) | range, midpoint shown, at 2 mmHg (reduced pressure) | HSDB | |
| Melting point | 88 °C (190.4 °F) | DOE PAC | |
| Density | 1.2 g/cm³ | ICSC | |
| 1.196 g/cm³ | at 25 °C | HSDB | |
| Solubility | Miscible in n-hexane, dichloromethane, 2-propanol, toluene | HSDB | |
| Miscible with most organic solvents. Sparingly soluble in ligroin and petroleum ether. | HSDB | ||
| Sol in water, 30 mg/l @ 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 0.0002 mmHg | NIOSH | |
| 0.000105 mmHg | at 20 °C | HSDB | |
| 0.00017 mmHg | at 20 °C | CAMEO | |
| Flash point | Not combustible (EPA, 1998) | CAMEO | |
| Lower explosive limit (LEL) | Combustible Liquid | NIOSH | |
| Corrosivity | Corrosive to iron | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Sulfotep
Incompatible materials
Incompatible with strong oxidizers
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
TETRAETHYL DITHIOPYROPHOSPHATE is incompatible with the following: Strong oxidizers, iron [Note: Corrosive to iron.] (NIOSH, 2024). Organothiophosphates 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 Sulfotep in the storage compatibility matrix →