THERMAL STABILITY STUDIES OF SOME AMINOBENZOIC DERIVATIVES

Thermal analysis on some aminobenzoic acids derivates using DSC TG-FTIR Hot-stage Microscopy were done on individual derivatives and later same analysis when these derivatives are mixed using physical and kneading method. TG-FTIR which is a technique coupling TGA and FTIR was undertaken to check evolved gases in heating these compounds.The thermal behaviour in the solid state of various substituted aminobenzoic acids (3- aminobenzoic acid (3-ABA) 4-aminobenzoic acid (4-ABA) 3-aminosalicylic acid (3-ASA) 4- aminosalicylic acid (4-ASA) and 5-aminosalicylic acid (5-ASA) as well as the parent benzoic acid (BA) and salicylic acid (SA) as reference substances and possible decomposition products: 2-aminophenol (2-AP) 3-aminophenol (3-AP) and 4-aminophenol (4-AP) has been examined.