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Fuel Antioxidants

The purpose of an antioxidant additive is to extend the induction period and control gum formation by terminating the free radical chain reactions involved in hydrocarbon oxidation. The antioxidant selection and concentration levels depend on various factors, including storage conditions and petroleum fuel composition.

Innospec Fuel Specialties Fuel Antioxidant Approvals List

 

US Military
(JP-4, JP-5, JP-8)

US Civil
(Jet A, A-1, B)

Canada
(Kerosene, Wide-Cut)

International
(ASTM, IATA, MOD)

AO‑30

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AO‑31

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AO‑37

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A0-30, AO-31 and AO-37 are acceptable for use in aviation gasoline and turbine fuels. Request further product information bulletins for additional details of additive properties and performance - Technical Memo 10,001 describes the use and approval status of Innospec Fuel Specialties additives for aviation fuels.

AO-22: N,N'-di-sec-butyl-p-phenylenediamine. Readily soluble in gasoline in all proportions. USE: Sweetens gasoline and retards formation of gum. In turbine, transformer and hydraulic oils, waxes and greases to retard oxidation.

AO-24: A 50% A.I., principally N,N'-di-sec-butyl-p-phenylenediamine, in a high flash solvent. USE: Sweetens gasoline and retards formation of gum. Specially blended for low temperature handling.

AO-29: 2,6-di-tert-butyl-4-methylphenol. A light colored, finely divided solid, and readily soluble in oils: bulk density 0.61 g/cc. USE: In turbine, transformer and hydraulic oils, waxes and greases to retard oxidation and in gasoline to reduce the formation of gum.

AO-30: 100% alkylated phenols, principally 2,4-dimethyl-6-tert-butylphenol (97% min.). USE: In jet fuels and gasolines to retard oxidation and in gasolines to reduce gum formation.

AO-31: 100% alkylated phenols, principally 2,4-dimethyl-6-tert-butylphenol (72% min.). USE: In jet fuels and gasolines to retard oxidation, and in gasolines to reduce gum formation.

AO-32: 100% alkylated phenols, principally 2,4-dimethyl-6-tert-butylphenol (55% min.) and 2,6-di-tert-butyl-4-methyl phenol (15% min.). USE: In jet fuels and gasolines to retard oxidation, and in gasolines to reduce gum formation.

AO-36: 100% alkylated phenols, principally propylated and butylated phenols. USE: In gasolines to retard oxidation and reduce gum formation. Excellent low temperature properties. Also available as AO-36D (80% A.I.) in solvent.

AO-37: 100% alkylated phenols, principally 2,6-di-tert-butylphenol. Readily soluble in gasoline. USE: In jet fuels and gasolines to retard oxidation and reduce gum formation. Widely approved for aviation fuels. Also available as dilute blends for low temperature handling (AO-37D (80% active) and AO-37/70 (70% active) in solvent).


 

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