What are the main uses of 1,1-Cyclobutanedicarboxylic acid (CAS: 5445-51-2)?

1,1-Cyclobutanedicarboxylic acid (CAS: 5445-51-2) finds applications in pharmaceuticals as a building block for drug development, in industrial processes for polymer production, and in research for creating functional materials. It is also used as a food additive to regulate pH and as a precursor in the synthesis of various organic compounds, including pharmaceutical intermediates and coatings.