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TrusTec® PRF Octane Blend No. 90 is a primary reference fuel with 90% isooctane and 10% n-heptane for measuring octane rating.
TrusTec® PRF Octane Blend No. 90 primary reference fuel meets the requirements outlined in ASTM D-2699 and ASTM D-2700 for octane testing. The reference fuel is composed of 90% isooctane and 10% n-heptane.
Specific Gravity at 60/60 °F: 0.6960–0.6970
Composition, vol %:
Isooctane: 89.70–90.30
n-Heptane: 9.70–10.30
Comprised of 90% isooctane
Meets ASTM D-2699 and D-270 specifications
Refineries and laboratories require reliable reference fuels to determine gasoline octane values.
Oil refining
Laboratory testing
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