Natural　deep　eutectic　solvents　(NADESs)　are　a　subcategory　of　deep　eutectic　solvents　(DESs)　consisting　solely　of　natural　compounds.　They　can　replace　existing　DESs　that　contain　toxic　compounds　and　are　difficult　to　dispose　of　in　many　applications.　However,　the　detailed　physical　properties　data　of　NADESs　are　still　very　scarce　in　the　literature.　In　this　work,　a　series　of　NADESs　with　choline　chloride　(ChCl)　as　the　shared　hydrogen-bond　acceptor　(HBA),　and　five　dicarboxylic　acids　(oxalic,　malonic,　maleic,　malic　and　tartaric)　as　the　varied　hydrogen-bond　donors　(HBDs)　were　prepared.　The　densities　and　viscosities　of　prepared　NADESs　were　determined　from　293.2　to　353.2　K　at　1.013　bar.　The　densities　and　viscosities　data　were　fitted　using　empirical　equations.　An　important　application　of　DESs　is　gas　separation,　which　requires　knowing　the　solubilities　of　gases　in　DESs.　Therefore,　a　NADES　with　relatively　good　fluidity　was　selected　out　as　a　representative　to　determine　the　solubilities　of　two　typical　acidic　gases　(SO2　and　H2S)　in　it.　The　solubilities　of　SO2　and　H2S　were　determined　from　298.2　to　333.2　K　and　from　0　to　1　bar.　The　SO2　and　H2S　solubilities　data　were　fitted　using　the　Krichevsky　−　Kasarnovsky　equation.　©　2021　Elsevier　Ltd