Growing water scarcity and widespread water pollution have intensified water resource shortages globally. Water treatment serves as an effective approach to ease this pressure. With increasingly stringent environmental protection regulations, remarkable progress has been achieved in treating rainwater, reclaimed sewage, atmospheric water resources and industrial wastewater to meet qualified discharge standards. As a key water treatment chemical, technical grade sodium tripolyphosphate is governed by formal usage and quality requirements.

　　China attaches great importance to the quality inspection of sodium tripolyphosphate. After collecting multi-stakeholder feedback, the industry standard HG/T 5563-2019 Water Treatment Agent Sodium Tripolyphosphate was issued and officially enforced on July 1, 2020.

　　Test Items & Specification Limits for Technical Grade Sodium Tripolyphosphate (Water Treatment Grade)

　　Sodium tripolyphosphate content: ≥92%

　　Total phosphate content: 56.0%–59.0%

　　Water-insoluble matter: ≤0.1%

　　Iron content: ≤0.015%

　　pH value: 9.2–10.0

　　Whiteness: ≥85%

　　Arsenic content: ≤0.003%

　　Cadmium content: ≤0.0005%

　　Lead content: ≤0.003%

　　Chromium content: ≤0.003%

　　HG/T 5563-2019 is a recommended industrial standard. Nevertheless, it delivers high reference value for manufacturers’ quality control, government sampling supervision, purchaser evaluation, and arbitration inspection by third-party institutions. The implementation of HG/T 5563-2019 marks the standardization journey of technical grade sodium tripolyphosphate as a water treatment additive, which drives overall quality management upgrades across the whole industry.

　　Against tightening environmental compliance, water utilities and wastewater treatment facilities need reliable chemical additives. High-performance technical grade sodium tripolyphosphate from qualified suppliers such as Chuandong Chemical Group supports stable water treatment operation and efficient water conservation in practical projects.