Potassium pyrophosphate, also known as pyrophosphate, 4 K, a white powder or solid block. The relative density of 2.534. Melting point 1109°C. Soluble in water, solubility 187g/100g water (25°C). Alkaline aqueous solution, 1% aqueous solution of pH=10.2. Insoluble in ethanol. The properties are similar to other polyphosphates.
Technical Specifications:
S/N.
SPECIFICATIONS
INDUSTRIAL GRADE
FOOD GRADE
1
Potassium pyrophosphate (K4P2O4)
≥
98
98
2
PH of 1% water solution
10-10.5
10-10.5
3
Phosphorus pentoxide
≥
42.2
42.2
4
Water insoluble
≤
0.2
0.2
5
Heave metals,as Pb
≤
0.003
0.001
6
Chloride,as CI
≤
0.005
0.001
7
Ferum(as Fe)
≤
0.01
0.003
8
Arsenic, as As
≤
0.005
0.0003
9
Orthophosphate
Qualified
Qualified
Use:
Mainly used for cyanide-free plating complexing agent for metal surface cleaning agent, dye, dispersant and buffer.
Packing
Plastic knit bag, Net weight 25kg or 50kg. Storage in ventilated and dry place.
