Substance profile
Resmethrin
Resmethrin is a waxy off-white to tan solid with a chrysanthemate odor.
01 · Identification
What Resmethrin is
Resmethrin is a waxy off-white to tan solid with a chrysanthemate odor. Its molecular formula is C22H26O3 and its molecular weight is 338.4 g/mol. It boils at 180 °C, melts at 56.5 °C.
Under the GHS it carries the signal word Warning. It is classed as teratogens.
Other names for Resmethrin
- resmethrin (ISO)
- 5-benzyl-3-furylmethyl (±)-cis-trans-chrysanthemate
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 |
|---|---|
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P270, P273, P301, P312, P330, P391, P501
03 · Physical and chemical properties
Resmethrin 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 | 180 °C (356 °F) | above this value | HSDB |
| Melting point | 56.5 °C (133.7 °F) | HSDB | |
| 45.5 °C (113.9 °F) | range, midpoint shown | HSDB | |
| Density | 0.96 g/cm³ | ICSC | |
| 0.963 g/cm³ | range, midpoint shown, at 20 °C | HSDB | |
| Solubility | Very sol in xylene and aromatic petroleum hydrocarbons; solubility in kerosene 10% | HSDB | |
| In water, 0.0379 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 1.13e-8 mmHg | at 30 °C | HSDB |
| 1e-8 mmHg | Haz-Map | ||
| Vapor pressure, Pa at 20 °C: | at 20 °C | ICSC | |
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Resmethrin
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
Insol in water at 25 °C; methylene chloride at 25 °C: greater than 50% wt/wt; in acetone at 25 °C: greater than 50% wt/wt; in ethanol and isopropanol 8 and 7%, /respectively/
Source: HSDB
05 · Handling and storage
Storing and handling Resmethrin
Storage conditions
... /Store/ under dry conditions.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatibility: Strong oxidizers. /Pyrethrins/
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
A pyrethroid derivative.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Resmethrin in the storage compatibility matrix →