Kahela, Paavo published the artcilePolymorphism of tienilic acid, Safety of 2-(2,3-Dichloro-4-(thiophene-2-carbonyl)phenoxy)acetic acid, the main research area is polymorphism tienilic acid.
One amorphous and 3 crystalline forms of tienilic acid (I) [40180-04-9] were characterized by using IR spectroscopy and X-ray diffraction. Form A is stable at room temperature, while forms B and C and the amorphous form are metastable. Form B changes to form A near the m.p. and the amorphous form into form C at 120°. Further, during mech. grinding, the mixed form containing forms A and B changes to form A and the amorphous form into form C.
Acta Pharmaceutica Fennica published new progress about polymorphism tienilic acid. 40180-04-9 belongs to class benzothiophene, name is 2-(2,3-Dichloro-4-(thiophene-2-carbonyl)phenoxy)acetic acid, and the molecular formula is C13H8Cl2O4S, Safety of 2-(2,3-Dichloro-4-(thiophene-2-carbonyl)phenoxy)acetic acid.
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem