name：4-aminobenzenesulfonic acid

Formula：C6H7NO3S

M.W：173.19

CAS NO.：121-57-3

Characters：The goods is white to gray powder, slightly soluble in cold water, soluble in caustic soda solution and sodium carbonate solution, insoluble in organic solvents such as ethanol and ether, density 1.485 (25/4 ℃), melting point 288 ℃, 300 ℃ in the decomposition.

Usage：This product is an important intermediate raw material, mainly used in dyes and whitening agents.