Used as a photolabile protecting group in organic synthesis, particularly in the controlled release of bioactive molecules upon exposure to light. Its nitro group enhances photoreactivity, allowing for efficient uncaging under near-UV or visible light, making it valuable in chemical biology for precise spatiotemporal modulation of neurotransmitters, nucleotides, and signaling molecules in living systems. Also employed in the development of light-responsive materials and drug delivery systems where external activation is required.