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Beyond traditional water treatment, HEDP is rapidly gaining popularity in textile printing and dyeing as well as paper-making industries, becoming a trending multifunctional additive. In textile processing, HEDP acts as a peroxide stabilizer and metal ion chelating agent, effectively eliminating heavy metal ion interference and improving dyeing uniformity and fabric finish. In paper-making industry, it stabilizes hydrogen peroxide during bleaching, avoids metal ion-induced decomposition, and improves bleaching efficiency. Its multi-scenario application value makes HEDP no longer a single water treatment agent, but a multifunctional industrial auxiliary chemical favored by multiple industries.