n-Heptane Chinese Name: Heptane English Name: n-Heptane Chemical Formula: C7H16 Molecular Weight: 100.2019 CAS Number: 142-82-5 EINECS Number: 205-563-8 Melting Point: -90.5 °C Boiling Point: 98.5 °C Density: 0.68 Flash Point: -4 °C Appearance: Colorless, volatile liquid Solubility: Insoluble in water; soluble in ethanol and carbon tetrachloride; miscible with benzene. Applications: 1. Primarily used as a standard for determining octane ratings, as well as a solvent and raw material in organic synthesis. 2. Used as an analytical reagent and solvent. 3. Extraction solvent. 4. Employed as an analytical reagent, reference material in chromatography, and solvent. It can irritate the respiratory tract. 5. Biochemical research, protein sequence analysis. Used in the determination of ozone and triglycerides. Pesticide residue analysis. Spectroscopy and fluorescence analysis.