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TrusTec® Toluene Standard Fuel 96.9 is a primary reference fuel with 74.3% toluene, 21.3% n-heptane, and 5.3% isooctane for calibrating engines during octane analysis.
Composition, vol %:
n-Heptane: 20.7–21.3
Toluene: 73.7–74.3
Isooctane: 4.7–5.3
Specific gravity at 60/60 °F: 0.823–0.825
Conor Robertson, Technical Specialist
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TrusTec® Toluene Standard Fuel 96.9 is a primary reference fuel that meets the requirements outlined in ASTM D-2699 and ASTM D-2700 for fuel analysis. The reference fluid is a blend of 74.3% toluene, 21.3% n-heptane, and 5.3% isooctane, and is intended to be used to calibrate knock engines to determine octane rating.
Refineries and laboratories measuring octane rating require reliable reference fuels to calibrate test engines.
Oil refining
Laboratory testing
Gasoline octane analysis
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