Question: are tannins soluble in dichloromethane?
Answer: water-soluble material: mainly tannins, caffeine insoluble material: cellulose, etc. ... Since caffeine is more soluble in dichloromethane (140 mg/ml) than it is in water (22 mg/ml), it readily dissolves in the dichloromethane. However, the tannins are slightly soluble in the dichloromethane.