Substance profile
Mesotrione
Mesotrione is a pale yellow solid with a faint pleasant odor.
01 · Identification
What Mesotrione is
Mesotrione is a pale yellow solid with a faint pleasant odor. Its molecular formula is C14H13NO7S and its molecular weight is 339.32 g/mol. It melts at 165 °C.
Under the GHS it carries the signal word Warning.
Other names for Mesotrione
- mesotrione (ISO)
- 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohexanedione
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 |
|---|---|
| H361d | Suspected of damaging the unborn child. |
| H373 | May cause 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, P273, P314, P391, P501
03 · Physical and chemical properties
Mesotrione 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 |
|---|---|---|---|
| Melting point | 165 °C (329 °F) | HSDB | |
| Solubility | In water, (g/L at 20 °C): 2.2 (pH 4.8); 15 (pH 6.9); 22 (pH 9); 0.16 (unbuffered water) | at 20 °C | HSDB |
| Vapor pressure | 42.6785 mmHg | below this value, at 20 °C | HSDB |
| 4e-8 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Mesotrione
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
Solubility in g/L at 20 °C): in acetonitrile 117.0, acetone 93.3, 1,2-dichloroethane 66.3, ethyl acetate 18.6, methanol 4.6, toluene 3.1, xylene 1.6, n-heptane <0.5
Source: HSDB
05 · Handling and storage
Storing and handling Mesotrione
Storage conditions
Can be stored as low as 20 °F.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Strong oxidizing agents
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Mesotrione in the storage compatibility matrix →