Substance profile
Difenacoum
Difenacoum is colorless crystals and is odorless.
01 · Identification
What Difenacoum is
Difenacoum is colorless crystals and is odorless. Its molecular formula is C31H24O3 and its molecular weight is 444.5 g/mol. It boils at 290 °C, melts at 216 °C.
Under the GHS it carries the signal word Danger.
Other names for Difenacoum
- difenacoum (ISO)
- 3-(3-biphenyl-4-yl-1,2,3,4-tetrahydro-1-naphthyl)-4-hydroxycoumarin
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 |
|---|---|
| H360D | May damage the unborn child. |
| H330 | Fatal if inhaled. |
| H310 | Fatal in contact with skin. |
| H300 | Fatal if swallowed. |
| H372 | Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| 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, P314, P330, P352, P391, P501
03 · Physical and chemical properties
Difenacoum 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 | 290 °C (554 °F) | decomposes, decomposes before boiling | HSDB |
| Melting point | 216 °C (420.8 °F) | range, midpoint shown | HSDB |
| Density | 1.27 g/cm³ | at 21.5 °C | HSDB |
| Solubility | Slightly soluble in alcohols; soluble in acetone, chloroform, and other chlorinated solvents. | HSDB | |
| In water at 20 °C, 84 mg/L (pH 9.3); 2.5 mg/L (pH 7.3); 0.031 mg/L (pH 5.2) | at 20 °C | HSDB | |
| In water at 20 °C, 0.0025 mg/L at pH 4.0; 0.483 mg/L at pH 6.5; 3.72 mg/L at pH 8.9 | at 20 °C | HSDB | |
| Vapor pressure | 5e-11 mmHg | at 25 °C | HSDB |
| 0.0000012 mmHg | at 45 °C | HSDB | |
| 0.0000012 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Difenacoum
Storage conditions
Keep away from food or water supplies, children, domestic animals, and wildlife. Keep container closed for freshness; do not re-use empty container.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Difenacoum in the storage compatibility matrix →