Synonyms: n -Undecane; Hendecane Formula: CH₃(CH₂)₉CH₃ Formula Weight: 156.31 CAS No.: 1120-21-4 Purity: ≥99.8% (GC) Density: 0.74 g/mL at 25 °C(lit.) Supplemental Hazard Statements: Repeated exposure may cause skin dryness or cracking.