Agent Name
CAS Number
Major Category
Other Uses
Ethoxyquin formula graphical representation
1,2-Dihydro-2,2,4-trimethyl-6-ethoxyquinoline; 1,2-Dihydro-6-ethoxy-2,2,4-trimethylquinoline; 2,2,4-Trimethyl-6-ethoxy-1,2-dihydroquinoline; 6-Ethoxy-1,2-dihydro-2,2,4-trimethylquinoline; 6-Ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline; Alterungsschutzmittel EC; Amea 100; Antage AW; Antioxidant EC; Aries Antox; Dawe's nutrigard; EMQ; EQ; Ethoxychin [Czech]; Ethoxyquin [ISO]; Ethoxyquine; Niflex; Niflex D; Nix-Scald; Nocrac AW; Nocrack AW; Permanax 103; Quinol ED; Quinoline, 6-ethoxy-1,2-dihydro-2,2,4-trimethyl-; Santoflex A; Santoflex AW; Santoquin; Santoquine; Santoquine (VAN); Stop-Scald; [ChemIDplus]
Animal Feed Additives
Yellow liquid; [Merck Index] Light yellow to dark brown viscous liquid with an odor like mercaptans; Darkened by light and air; [CAMEO] Formulated as an emulsifiable concentrate and an impregnated wrap; [Reference #2] Dark brown liquid; [Aldrich MSDS]
Used as an additive to animal feed; [Kanerva, p. 1793] Used as an antioxidant for food and feed and as anti-degradation agent for rubber; [Merck Index] Also used as a post-harvest dip for apples and pears; [ChemIDplus] Registered in the US as an antioxidant for the control of post-harvest scald (browning) in pears; Also registered with the FDA as a preservative for animal feed, dehydrated crops, sorghum, and for color preservation in chili powder, paprika, and ground chili; [Reference #2]
Allergic contact dermatitis reported in a feed mill worker; [Kanerva, p. 1793] A skin irritant; May cause reversible changes to the liver; Reports of contact dermatitis in animal feed employees; [HSDB] May polymerize on exposure to light and air; A skin and eye irritant; May cause skin sensitization; [CAMEO] Strongly associated with cases of occupational contact dermatitis; Causes increased liver enzymes in animal experiments; [Reference #2]
Biomedical References

Exposure Assessment

Vapor Pressure
0.000132 mm Hg
Explanatory Notes
VP = 0.000256 mm Hg at 77° F (NTP, 1992); [CAMEO]
Reference Link #2

Adverse Effects

Skin Sensitizer
Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Diseases, Processes, and Activities Linked to This Agent


Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure: