BHMTPH·PN(Na2) is the partial sodium salt of 2-hydroxy-4-(methylthio)butane-1,2,4-tricarboxylic acid (BHMTPMPA), a specialty phosphonate chemical. It serves as an effective scale inhibitor and corrosion inhibitor in industrial water treatment, including cooling water systems, boilers, desalination plants, and reverse osmosis processes. Its strong chelating ability binds metal ions like calcium and magnesium, preventing scale deposition and maintaining system efficiency. Additionally, it is used in oilfield applications for scale control in wells and pipelines, and as a stabilizer in detergent formulations. Known for its high thermal stability, hydrolytic resistance, and low toxicity, it is a preferred choice for environmentally conscious water management solutions.