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Ethoxyquin

Ethoxyquin

IUPAC name	6-ethoxy-1,2-dihydro- 2,2,4-trimethylquinoline
Identifiers
CAS number	91-53-2
SMILES	CC2(C)C=C(C)C1=CC (OCC)=CC=C1N2
Properties
Molecular formula	C₁₄H₁₉NO
Molar mass	217.30 g/mol
Melting point	<25 °C
Boiling point	123-125 °C at 2 mmHg
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Ethoxyquin is a quinoline-based antioxidant used as a food preservative and a pesticide (under commercial names such as "Stop-Scald"). It is commonly used as a preservative in pet foods to prevent the rancidification of fats. There has been some speculation that ethoxyquin in pet foods might be responsible for certain health problems. To date, the US FDA has only found a verifiable connection between ethoxyquin and buildup of protoporphyrin IX in the liver, as well as elevations in liver-related enzymes in some animals. It has been shown to cause mortality in fish.