Substance profile
TEPP (ISO)
TEPP (ISO) is a mobile liquid with an agreeable odor.
01 · Identification
What TEPP (ISO) is
TEPP (ISO) is a mobile liquid with an agreeable odor. Its molecular formula is C8H20O7P2 and its molecular weight is 290.19 g/mol. It boils at 310 °C, melts at 0 °C, is miscible with water.
Under the GHS it carries the signal word Danger.
Other names for TEPP (ISO)
- tetraethyl pyrophosphate
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. |
Precautionary statements: P270, P273, P280, P301, P302, P310, P330, P352, P391, P501
03 · Physical and chemical properties
TEPP (ISO) 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 |
| 82 °C (179.6 °F) | at 0.05 mmHg (reduced pressure) | HSDB | |
| 137.78 °C (280 °F) | at 2.3 mmHg (reduced pressure) | CAMEO | |
| Melting point | 0 °C (32 °F) | NIOSH | |
| Density | 1.19 g/cm³ | NIOSH | |
| 1.185 g/cm³ | at 20 °C | HSDB | |
| 1.2 g/cm³ | at 25 °C | HSDB | |
| Solubility | Miscible with glycerol, ethylene glycol, toluene, propylene glycol, acetone, methanol, benzene, carbon tetrachloride, xylene, ethanol, chloroform | HSDB | |
| Miscible in water | HSDB | ||
| Miscible (decomposes) (NTP, 1992) | decomposes | CAMEO | |
| Vapor pressure | 0.0002 mmHg | NIOSH | |
| 0.015 mmHg | at 20 °C | ICSC | |
| 0.00026 mmHg | at 25 °C | HSDB | |
| Flash point | 110 °C (230 °F) | above this value | ICSC |
| Lower explosive limit (LEL) | Noncombustible Liquid | NIOSH | |
| Not combustible. (EPA, 1998) | CAMEO | ||
| Upper explosive limit (UEL) | Not combustible. (EPA, 1998) | CAMEO | |
| Vapor density | 10 (air = 1) | ICSC | |
| Corrosivity | TEPP will attack some forms of plastics, rubber, and coatings. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling TEPP (ISO)
Storage conditions
It should be stored in moisture-proof containers in a cool well-ventilated area. Empty drums should be decontaminated; never re-use containers.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatibilities: ... it is incompatible with alkaline materials.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
TETRAETHYL PYROPHOSPHATE reacts slowly with water to form HPO3; corrosive to aluminum; slowly corrosive to copper, brass, zinc and tin; incompatible with strong oxidizers (NTP, 1992). Organophosphates, such as TETRAETHYL PYROPHOSPHATE, 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 TEPP (ISO) in the storage compatibility matrix →