ethyl 5-formyl-1H-pyrrole-2-carboxylate; CAS No.: 7126-50-3; Ethyl 5-formyl-1H-pyrrole-2-carboxylate, a pyrrole aldehyde, exemplifies our building blocks for porphyrin analogs and metal-organic frameworks. The formyl group supports Schiff base formation. As a chemical online store, we provide rapid access to this intermediate for photodynamic therapy and catalysis research, with batch-to-batch consistency validated via NMR.