Substance profile
Clopyralid
Clopyralid is a white crystalline solid and is odorless.
01 · Identification
What Clopyralid is
Clopyralid is a white crystalline solid and is odorless. Its molecular formula is C6H3Cl2NO2 and its molecular weight is 192 g/mol. It melts at 152 °C.
Under the GHS it carries the signal word Danger.
Other names for Clopyralid
- clopyralid (ISO)
- 3,6-dichloropyridine-2-carboxylic acid
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 |
|---|---|
| H318 | Causes serious eye damage. |
03 · Physical and chemical properties
Clopyralid 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 | 151.5 °C (304.7 °F) | range, midpoint shown | HSDB |
| Solubility | In water, 7.85X10+3 mg/L (distilled water); 188 g/L at pH 5, 143 g/L ay pH 7; 157 g/L at pH 9, all at 20 °C | at 20 °C | HSDB |
| Approximately 1000 ppm in water at 25 °C | at 25 °C | HSDB | |
| Solubility at 25 °C: > 25% w/w in methanol, acetone, xylene | at 25 °C | HSDB | |
| Vapor pressure | 0.00000998 mmHg | at 25 °C | HSDB |
| 0.000015 mmHg | at 25 °C | ICSC | |
| 0.000012 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Clopyralid
Storage conditions
Do not store or transport in containers made from aluminium.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Clopyralid in the storage compatibility matrix →