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This program determines the molecular mass of a substance. Enter the molecular formula of the substance. It will calculate the total mass along with the elemental composition and mass of each element in the compound.
Octane is a chemical compound with a chemical formula of C₈H₁₈.
Octane | C8H18 | CID 356 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
9 Σεπ 2024 · Octane is a colorless liquid with a gasolinelike odor. The odor threshold is 4 ppm and 48 ppm (NewJersey Fact Sheet). Molecular weight = 114.26; Specificgravity (H2O:1)= 0.70; Boiling point = 125.6℃; Freezing/Melting point = 256.7℃; Vapor pressure =10 mmHg at20℃; Flash point =13℃ (cc); Autoignition temperature =206℃.
n-OCTANE provides high accuracy thermodynamic properties for normal octane (Molar mass =114.231 g/mole) using the Fundamental Equation of State, as described by: Span, R. and Wagner, W. "Equations of State for Technical Applications: II Results for Non-Polar Fluids"
Quantity Value Units Method Reference Comment; Δ f H° gas-208.7: kJ/mol: N/A: Good, 1972: Value computed using Δ f H liquid ° value of -250.3±1.8 kj/mol from Good, 1972 and Δ vap H° value of 41.6 kj/mol from Prosen and Rossini, 1945.; DRB: Δ f H° gas-208.4 ± 0.67: kJ/mol: Ccb: Prosen and Rossini, 1945
All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.
