Substance profile
Chlorothalonil
Chlorothalonil is colorless crystals and is odorless.
01 · Identification
What Chlorothalonil is
Chlorothalonil is colorless crystals and is odorless. Its molecular formula is C8Cl4N2 and its molecular weight is 265.9 g/mol. It boils at 350 °C, melts at 252 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
Other names for Chlorothalonil
- chlorothalonil (ISO)
- tetrachloroisophthalonitrile
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 |
|---|---|
| H351 | Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H330 | Fatal if inhaled. |
| H335 | May cause respiratory irritation. |
| H318 | Causes serious eye damage. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P261, P271, P272, P273, P280, P304, P305, P308, P310, P313, P333, P338, P391, P501
03 · Physical and chemical properties
Chlorothalonil 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 | 350 °C (662 °F) | HSDB | |
| 350 °C (662 °F) | at 760 mmHg | CAMEO | |
| Melting point | 252.1 °C (485.8 °F) | HSDB | |
| 250.56 °C (483 °F) | range, midpoint shown | CAMEO | |
| 250.5 °C (482.9 °F) | range, midpoint shown | ICSC | |
| Density | 1.8 g/cm³ | ICSC | |
| 1.732 g/cm³ | at 20 °C | HSDB | |
| 1.7 g/cm³ | at 25 °C | CAMEO | |
| Solubility | Soluble in benzene | HSDB | |
| In water, 0.81 mg/L at 25 °C | at 25 °C | HSDB | |
| Solubility (g/L, 25 °C): 20.9 acetone; 22.4 1,2-dichloroethane; 13.8 ethyl acetate; 0.2 n-heptane; 1.7 methanol; 74.4 xylene | at 25 °C | HSDB | |
| Vapor pressure | 5.7e-7 mmHg | at 25 °C | HSDB |
| 0.01 mmHg | below this value, at 40 °C | CAMEO | |
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Chlorothalonil
Storage conditions
Keep in cool, dry, ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Cyanides
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
CHLOROTHALONIL is stable in neutral or acidic aqueous media. May react violently with strong oxidizing acids [Farm Chemicals Handbook]. Incompatible with other oxidizing agents such as peroxides and epoxides. Breaks down slowly in basic aqueous media (half-life 38.1 days at pH 9). [Farm Chemicals Handbook].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Chlorothalonil in the storage compatibility matrix →