Used primarily in dental applications as a component of pulp-capping agents and cavity liners due to its ability to promote dentin formation and reduce post-operative sensitivity. It is also utilized in some adhesive systems for restorative dentistry, where it enhances bonding by improving resin penetration into dentin. Additionally, it acts as a developer in photographic chemicals and finds use in the synthesis of dyes and pH indicators. Its reactivity and solubility make it suitable as an intermediate in organic synthesis for pharmaceuticals and functional materials.