Key attributes
Molecular formula: Na5P3O10
Molecular weight: 367.86
Industrial grade CAS 7758-29-4
Industrial grade products & COA meets GB/T 9983-2004 standard:
Items for detecting and analyzing | Standard value |
Main content: sodium tripolyphosphate ≥ | 96.0% |
Phosphorus pentoxide P2O5≤ | 57.0% |
0.10% | |
Fluoride (as F) ≤ | 0.007% |
Ph Value (1%) | 9.2-10.0 |
Whiteness ≥ | 90 |

Industrial Grade Sodium Tripolyphosphate: Special Process & System Maintenance Applications
1.Industrial Boiler Water System Treatment Agent
In high-pressure boiler feedwater treatment, STPP effectively controls scale formation and prevents heat transfer efficiency reduction. Through chelation, it maintains long-term stable operation of boiler systems.
2.Metal Surface Phosphating Pre-treatment Agent
In metal coating pre-treatment processes, this product optimizes phosphating bath stability and promotes dense phosphate film formation, significantly enhancing subsequent coating adhesion and corrosion resistance.
3.Industrial Wastewater Softening Agent
In high-hardness industrial wastewater pre-treatment, STPP efficiently chelates calcium and magnesium ions to reduce water hardness, creating favorable conditions for subsequent membrane treatment or ion exchange processes.