TrusTec® PRF n-Heptane is a knock engine test reference fuel with 99.78% n-heptane that meets ASTM D-2699 and D-2700 standards for measuring octane rating.
TrusTec® PRF n-Heptane is a primary reference fuel with 99.78% n-heptane and 0.1% isooctane. The reference fluid meets ASTM D-2699 and ASTM D-2700 specifications for octane fuel analysis.
Composition, vol %:
n-Heptane: 99.78 min
Isooctane: 0.10 max
Lead content, g/gal: 0.002 max
Odor: Sweet
Flash point, °C: -4
Method: Tag closed cup
Lower explosion limit: 1% (V)
Upper explosion limit: 7% (V)
Oxidizing properties: No
Autoignition temperature, °C: 203.85
Molecular formula: C7H16
Molecular weight, g/mol: 100.23
Pour point: No data available
Boiling point/boiling range, °C: 98
Vapor pressure, psi at 38°C: 1.6
Relative density at 16°C: 0.69
Density, l/g at 20°C: 5.75
Water solubility: Negligible
Relative vapor density: 3.4 (air = 1.0)
Evaporation rate: 3.46
Percent volatile, %: > 99
Conductivity, pSm at 20°C: <1
CAS number: 142-82-5
Primary Chemistry:
n-Heptane
Oil refineries and laboratories measuring the octane rating of gasoline need reliable reference fuels for their test engines or risk inconsistent and inaccurate results.
Gasoline octane analysis
Petroleum refining
Laboratory testing
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