What is 4-Aminosalicylic acid

Product name:4-Aminosalicylic acid
CAS:     65-49-6
Molecular Formula:C7H7NO3
Formula Weight:153.14
Description:
Melting point:135-145 ºC
Chemical property:white crystal.
Use:serve as medicine intermediate.
Storage:In ventilate,cool and dry places.