n-Decane　is　a　major　ingredient　of　many　transportation　fuels,　and　is　widely　used　as　the　additive　in　engineering　domain.　To　supplement　the　existing　database,　the　speed　of　sound　in　n-decane　was　measured　along　five　isobaric　lines　from　(0.1　to　10)　MPa　and　at　temperatures　between　(298.32　and　653.93)　K　by　the　Brillouin　light　scattering　method.　With　the　level　of　confidence　of　0.95　(coverage　factor　k　=　2),　the　relative　expanded　uncertainty　of　our　measurement　system　and　that　of　the　experimental　speed　of　sound　in　n-decane　were　estimated　to　be　less　than　1.1%　and　1.7%,　respectively.　Besides,　the　absolute　average　percentage　deviation　and　the　maximum　deviation　of　the　experimental　results　from　values　calculated　with　the　recommended　fundamental　equation　in　the　NIST　Standard　Reference　Database　23　were　found　to　be　1.0%　and　4.4%,　respectively.　At　the　end,　for　temperatures　between　(303.15　and　373.15)　K　and　at　pressures　up　to　10　MPa,　the　derived　properties　of　n-decane　including　density,　isobaric　heat　capacity,　isobaric　thermal　expansion,　isothermal　compressibility,　isentropic　compressibility　and　internal　pressure　were　studied.　©　2020　Elsevier　Ltd