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4-Methylsulfonyl benzaldehyde is an organic compound that can be synthesized by a number of different methods. It is soluble in water and has a melting point of about 212 degrees Celsius. It has been shown to have anti-cancer properties, as well as inhibitory effects on Cox-2 enzyme, which is involved in inflammation.

light yellow-beige to light brown crystalline

4-(Methylsulfonyl)benzaldehyde has been used in the preparation of arylidene-thiazolidinedione derivatives for the treatment of type 2 diabetes.

4-Methylsulfonyl benzaldehyde has been used as a model for copper complexes, such as those found in wastewater treatment plants. It also shows promise for the removal of l-threonine from wastewater streams.