Sodium salt
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SODIUM TRIPOLYPHOSPHATE（STPP）
Guaranteed Technical Specifications
Byname: Pentasodium phosphate
Chemical formula: Na5P3O10
Standard Executed: GB/T9983-2004（INDUSTRIAL GRADE）GB25566-2010（FOOD GRADE）
Throughput: 50000 t/a
Properties
White microdot powder with luster, melting point at 622℃, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mg2+, can soften hard water, change suspension into solution, alkalescent, without causticity.
Uses
Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum product, gum latex storage, as dispersant, solvent in metal industry and pharmaceutical industry, also widely used in gum synthesis, foodstuff industry, and poultry process.
Packing and storage
plastic-woven sack with polythene inner bag, net weight 25kg, 50kg or 1000kg; keep away from water or moisture, do not pile up the open air.
- Other Parameters
指标名称 Specifications | 工业级 Industrial Grade | 食品级 Food Grade | |||
主含量 (Na5P3O10 )%≥ Main contents | 90.0 | 85.00 | |||
五氧化二磷（P2O5） %≥ Phosphorus pentoxide | 56.5 | 56.0-58.0 | |||
水不溶物 %≤ Water insoluble | 0.15 | 0.10 | |||
铁 %≤ Fe | 0.03 | 0.015 | |||
PH值（1%水溶物） PH value of 1% solution | 9.2-10.0 | 9.4-10.0 | |||
重金属（以Pb 计）%≤ Heavy metals, as Pb | / | 0.001 | |||
| 砷（以As计） %≤ Arsenic,as As | / | 0.0003 | |||
氟化物（以F计） %≤ Fluoride, as F | / | 0.003 | |||
白度 %≥ Whiteness | 85 | 85 | |||