Sodium Pyrophosphate

Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is a colorless transparent crystalline chemical compound with the formula Na4P2O7. It is a salt composed of pyrophosphate and sodium ions.

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Detailed Description for Sodium Pyrophosphate

Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is a colorless transparent crystalline chemical compound with the formula Na4P2O7. It is a salt composed of pyrophosphate and sodium ions. Toxicity is approximately twice that of table salt when ingested orally. There is also a hydrated form, Na4P2O7 · 10(H2O).

Tetrasodium pyrophosphate is used as a buffering agent, an emulsifier, a dispersing agent, and a thickening agent, and is often used as a food additive. Common foods containing tetrasodium pyrophosphate include chicken nuggets, marshmallows, pudding, crab meat, imitation crab, canned tuna, and soy-based meat alternatives and cat foods and cat treats where it is used as a palatability enhancer.

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

hygroscopic white crystals

MELTING POINT  
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER

slowly hydrolysis to sodium orthophosphate. (insoluble in alcohol and ammine)

pH

10.0 - 10.5 (1% sol.)

VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT  
STABILITY Stable under ordinary conditions

 

Physical form                  

White crystalline powder

Concentration (%)                          

≥96.5%

P2O5             

≥51.5%

PH              

9.9~10.7

Loss on ignition

0.5% max.

Fe 0.005 max.
As 0.003 max.

 

APPLICATIONS:

Water softener; metal cleaner; soap and detergent builder; sequestering agent; in electrodeposition of metals; enamelling improvement; tin plating; china-clay purification; dyeing; oil-drilling muds; synthetic rubber production; cleaning agents and detergents - high solubility, hardness stabilization, soil dispersion; toothpaste - prevention of tarter


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