Experimental solubility data of two solid derivatives of menadione in supercritical carbon dioxide: 2-((4-chlorobenzyl)amino)-3-methylnaphtalene-1,4-dione, and 2-((4-chlorophenethyl)amino)-3-methylnaphtalene-1,4-dione

•Two menadione derivatives were synthetized, purified and characterized.•Solubility of dichlone derivatives in SC-CO2 was measured at T < 333 K, P < 33 MPa.•Solubility data was correlated in terms of temperature and CO2 density with deviations <8 %.•Solubility of dichlone derivatives showed an unexpected increase with the molecular weight.•The molecular conformation could justify the solubility reversal trend.