Substance profile
Cypermethrin
Cypermethrin is a viscous semi-solid and is odorless.
01 · Identification
What Cypermethrin is
Cypermethrin is a viscous semi-solid and is odorless. Its molecular formula is C22H19Cl2NO3 and its molecular weight is 416.3 g/mol. It melts at 70 °C, is soluble in water.
Under the GHS it carries the signal word Warning.
Other names for Cypermethrin
- cypermethrin (ISO)
- α-cyano-3-phenoxybenzyl 3-(2,2-dichlorovi-nyl)-2,2-dimethylcyclopro-panecarboxylate
- cypermethrin cis/trans +/- 40/60
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 |
|---|---|
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| 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, P271, P273, P301, P304, P312, P314, P330, P391, P501
03 · Physical and chemical properties
Cypermethrin 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 | 70 °C (158 °F) | HSDB | |
| 70 °C (158 °F) | range, midpoint shown | HSDB | |
| Density | 1.1 g/cm³ | ICSC | |
| 1.25 g/cm³ | at 20 °C | HSDB | |
| Solubility | Soluble in methanol, acetone, xylene, dichloromethane | HSDB | |
| Soluble in methanol and methylene dichloride | HSDB | ||
| In acetone, chloroform, cyclohexanone, xylene greater than 450, ethanol 337, hexane 103 (all in g/L at 20 °C). | at 20 °C | HSDB | |
| Vapor pressure | 1.7e-9 mmHg | OSHA | |
| 1.7e-9 mmHg | at 20 °C | HSDB | |
| Vapor pressure, Pa at 20 °C: | at 20 °C | ICSC | |
| Vapor density | 1.25 (air = 1) | OSHA | |
| Corrosivity | Non-corrosive to metals | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Cypermethrin
Storage conditions
Store technical material and formulations away from heat, under lock and key, and out of the reach of children, animals, and unauthorized personnel. Store in an area designated for insecticide storage, preferably without drains. Store away from other chemicals, foodstuffs, and animal feed.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
... Incompatible with lime & ordinary soaps because acids & alkalies speed up processes of hydrolysis. /Pyrethrins/
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Cypermethrin in the storage compatibility matrix →