Phosphoric Acid (607 FR) (CAS No.: 7664-38-2), chemically denoted as H₃PO₄, is a high-performance flame-retardant grade phosphoric acid specifically formulated for fire safety-critical applications. It is a colorless to pale yellow viscous liquid with strong acidity, excellent thermal stability, and superior flame-retardant efficiency. Our 607 FR grade is produced via the wet-process (from high-quality phosphate rock) or thermal-process (for ultra-high purity) at advanced facilities in China’s key chemical hubs (Hubei, Shandong, Sichuan), followed by precision purification and flame-retardant performance optimization.

With a typical concentration of 85% (customizable 75-90%), this product meets stringent industry standards (GB/T 2091-2011, ASTM D1159-13, ISO 3706:2011) and flame-retardant specifications for industrial materials. Key quality indicators are tightly controlled: free fluoride (F⁻) ≤0.001%, iron (Fe) ≤0.002%, arsenic (As) ≤0.0003%, and heavy metals (Pb/Cd) ≤0.0005%, ensuring compatibility with various substrates and compliance with global safety regulations. As a leading Chinese supplier, we leverage China’s abundant phosphate rock reserves, large-scale production capacity, and advanced flame-retardant formulation technology to deliver cost-effective, high-performance phosphoric acid (607 FR) to global customers.