Substance profile
Ethoxyquin
Ethoxyquin is a yellow liquid.
01 · Identification
What Ethoxyquin is
Ethoxyquin is a yellow liquid. Its molecular formula is C14H19NO and its molecular weight is 217.31 g/mol. It melts at 0 °C.
Under the GHS it carries the signal word Warning.
Other names for Ethoxyquin
- ethoxyquin (ISO)
- 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline
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. |
03 · Physical and chemical properties
Ethoxyquin 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 | 124 °C (255.2 °F) | range, midpoint shown, at 2 mmHg (reduced pressure) | HSDB |
| 123.89 °C (255 °F) | range, midpoint shown, at 2 mmHg (reduced pressure) | CAMEO | |
| Melting point | 0 °C (32 °F) | approximate | HSDB |
| 0 °C (32 °F) | below this value | CAMEO | |
| Density | 1.03 g/cm³ | range, midpoint shown, at 25 °C | HSDB |
| Solubility | less than 1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO |
| Vapor pressure | 0.0000182 mmHg | at 0 °C | CAMEO |
| 0.000132 mmHg | Haz-Map | ||
| Flash point | 107.22 °C (225 °F) | CAMEO | |
| Vapor density | 7.48 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Ethoxyquin
Incompatible materials
Can react with oxidizing materials.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
ETHOXYQUIN may undergo a hazardous polymerization at temperatures above 320 °F. Tends to polymerize and darken in color on exposure to light and air. Not compatible with oxidizing agents and with strong acids (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Ethoxyquin in the storage compatibility matrix →