alpha-Terpineol is a monoterpene alcohol reference substance offered in ROTICHROM® GC quality for gas-chromatography applications. It is identified by CAS number 98-55-5, EG number 202-680-6 and the empirical formula C₁₀H₁₈O, with a molar mass of 154,25 g/mol. Physical data include a density of 0,93 g/cm³, a boiling point of 218,9 °C and a flash point of 91 °C. Supplied in a 100 mg glass pack, the material supports calibration, peak assignment and method verification in GC workflows involving terpenoids and fragrance-related analytes. Laboratories use alpha-terpineol as a defined standard when characterising essential-oil components, synthetic intermediates or related monoterpene profiles. The ROTICHROM® GC grade from manufacturer Carl ROTH provides a compact reference portion suited to analytical benches that require reliable identity and chromatographic behaviour. Its well-documented physicochemical parameters facilitate integration into existing GC libraries and quality-control sequences without unnecessary bulk. This article is part of Essential oils & fragrances, in Natural products & essential oils. Key features Purity (GC): ≥96 % CAS number: 98-55-5 Pack size: 100 mg glass EG nr.: 202-680-6 Molar mass: 154,25 g/mol Density: 0,93 g/cm³ Technical Information Sheet: Safety Data Sheet: