Substance profile
Coumaphos
Coumaphos is colorless crystals with a slight sulfur-like odor.
01 · Identification
What Coumaphos is
Coumaphos is colorless crystals with a slight sulfur-like odor. Its molecular formula is C14H16ClO5PS and its molecular weight is 362.8 g/mol. It melts at 95.2 °C.
Under the GHS it carries the signal word Danger.
Other names for Coumaphos
- coumaphos (ISO)
- O-3-chloro-4-methylcoumarin-7-yl O,O-diethyl 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 |
|---|---|
| H300 | Fatal 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: P270, P273, P280, P301, P302, P310, P312, P330, P352, P391, P501
03 · Physical and chemical properties
Coumaphos 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 | 20 °C (68 °F) | at 1e-07 mmHg (reduced pressure) | CAMEO |
| Melting point | 95.2 °C (203.4 °F) | HSDB | |
| 91.11 °C (196 °F) | CAMEO | ||
| 91 °C (195.8 °F) | ICSC | ||
| Density | 1.474 g/cm³ | HSDB | |
| 1.47 g/cm³ | ICSC | ||
| 1.31 g/cm³ | at 25 °C | CAMEO | |
| Solubility | Limited solubility in organic solvents | HSDB | |
| Somewhat soluble in acetone, chloroform, corn oil | HSDB | ||
| In water, 1.5 mg/L at 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 97.508 mmHg | at 20 °C | HSDB |
| 1e-7 mmHg | at 20 °C | CAMEO | |
| 9.7e-8 mmHg | at 20 °C | DOE PAC | |
| Flash point | Not Applicable. Combustible solid. (USCG, 1999) | CAMEO | |
| Odor threshold | 2.0X10-2 ppm (Detection in water; purity not specified). | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Coumaphos
Storage conditions
Storage temperature: Ambient
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Strong oxidizing agents
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Organothiophosphates, such as COUMAPHOS, 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. It reacts with strong oxidizing agents and alkaline materials. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Coumaphos in the storage compatibility matrix →