CAS No.: 232938-43-1
Molecular Formula: C21H20N2O6S2
Molecular Weight: 460.52
EINECS No.: 432-520-2 

The main uses of 3-(3-tolylureido)phenyl 4-methylbenzenesulfonate (CAS 232938-43-1, also known as PF-201) are as follows: 

Thermal paper color developer
As the core color-developing component, it is used in the color-developing reaction of thermal paper and is an environmentally friendly product. 

Organic synthesis intermediates
Serving as key intermediates in the pharmaceutical and fine chemical industries, for instance, in the synthesis of active pharmaceutical ingredients or functional materials.