In this study, effects of steam with different density (saturated and dry steam) on five characteristic organic chemicals such as alcohol, ester, aromatics, phenol and fatty acid were investigated below 200 °C. The natures of the tested organic chemicals were analyzed by weight loss in steam. The experimental results showed that the dissolving behavior of each organic compound in steam is significantly different. Alcohols and phenanthrene can dissolve easily in steam with low density; High saturated fatty acid cannot almost dissolve in steam below 200 °C; Ester are less stable in saturated steam; Phenols revealed a variable behavior characterized by an increase of weight at early stage and a decrease later in saturated steam, and companied by color change. It must be necessary to consider proper steam density condition for selective extraction of some special chemicals.