Substance profile
Permethrin
Permethrin is colorless crystals to a viscous liquid; Color, white to pale yellow.
01 · Identification
What Permethrin is
Permethrin is colorless crystals to a viscous liquid; Color, white to pale yellow. Its molecular formula is C21H20Cl2O3 and its molecular weight is 391.3 g/mol. It boils at 290 °C, melts at 64 °C.
Under the GHS it carries the signal word Warning.
Other names for Permethrin
- permethrin (ISO)
- m-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
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. |
| 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: P260, P261, P270, P271, P272, P273, P280, P301, P304, P312, P313, P330, P333, P391, P501
03 · Physical and chemical properties
Permethrin 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) | above this value, at 760 mmHg | HSDB |
| 200 °C (392 °F) | at 0.1 mmHg (reduced pressure) | HSDB | |
| 220 °C (428 °F) | at 0.05 mmHg (reduced pressure) | DrugBank | |
| Melting point | 64 °C (147.2 °F) | range, midpoint shown | HSDB |
| 36.5 °C (97.7 °F) | range, midpoint shown | ICSC | |
| 20 °C (68 °F) | below this value, OECD Method 102 | HSDB | |
| Density | 1.2 g/cm³ | ICSC | |
| 1.23 g/cm³ | range, midpoint shown, at 20 °C | HSDB | |
| Solubility | In water, 0.0111 mg/L at 20 °C, pH 7.0-9.3 (OECD Method 105) | at 20 °C | HSDB |
| In water, 6.00X10-3 mg/L (pH 7, 20 °C); cis-isomers 0.20 mg/L (25 °C); trans-isomers 0.13 mg/L (25 °C) | at 20 °C | HSDB | |
| In xylene and hexane >1000, methanol 258 (all in g/kg at 25 °C) | at 25 °C | HSDB | |
| Vapor pressure | 21.7518 mmHg | at 25 °C | HSDB |
| 5.18e-8 mmHg | at 25 °C | HSDB | |
| 2e-8 mmHg | Haz-Map | ||
| Corrosivity | Does not corrode aluminum | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Permethrin
Reactivity
A pyrethroid derivative.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Permethrin in the storage compatibility matrix →