Tetra Sodium Pyrophosphate(TSPP)
Byname: Tetra Sodium pyrophosphate
Molecular formula: Na4P2O7
Molecular Weight: 265.9
Standard executed: HG/T2968-1999(Technical Grade)
                                 GB8848-88(Food Grade)
CAS Number: 7722-88-5
Properties
White powder; Soluble in water but insoluble in ethanol; Relative density 2.45g/cm3and melting

point 890; Deliquescent in the open air. Its aqueous solution shows weak alkalinity and is

stable at 70  but will be hydrolyzed into di-sodium phosphate when boiled .
Uses:
Applied in industries of detergents as detergent auxiliary, paper production to bleach and

electroplating; In food industry it is used as buffering agent, emulsifier, nutrition ingredients

and quality improver.
Packing and storage:
In 25kg,50kg,1000kg net bage,store at a cool,dry and well ventilated place.
Guaranteed Technical Specifications:
NO  Specifications   Industrial Grade  Food Grade
 1  Appearance   white powder or granular  
 2 Assay (as Na4P2O7 )%≥ 96.5         96.5
 3 P2O5 %≥          51.5                51.5
  4  Ortho Phosphates         pass         pass
  5  PH Value           9.9-10.7             9.9-10.7
  6  Water Insoluble matter %  0.1        0.1
  7  Size (through 60mesh sieve) 90.0          90
  8  Fluoride (as F) ≤              0.005
  9  Heavy Metals (as Pb) % ≤              0.001
  10  Arsenic (As)% ≤                        0.0003
  11 L.O.I% ≤                           0.5