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Tetrasodium pyrophosphate

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Tetrasodium pyrophosphate Basic information

Product Name:
Tetrasodium pyrophosphate
CAS:
7722-88-5
MF:
Na4O7P2
MW:
265.902402
EINECS:
231-767-1
Mol File:
7722-88-5.mol
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Tetrasodium pyrophosphate Chemical Properties

Melting point:
80 °C
Boiling point:
93.8 °C
Density 
2.53 g/mL at 25 °C(lit.)
storage temp. 
Store at room temperature.
solubility 
H2O: 0.1 M at 20 °C, clear, colorless
form 
Granular
Specific Gravity
2.534
color 
White
Odor
Odorless
PH Range
10.3
Water Solubility 
Soluble in water. Insoluble in ethyl alcohol.
Sensitive 
Hygroscopic
Merck 
14,9240
Stability:
Stable. Incompatible with strong oxidizing agents.
InChIKey
FQENQNTWSFEDLI-UHFFFAOYSA-J
CAS DataBase Reference
7722-88-5(CAS DataBase Reference)
EPA Substance Registry System
Tetrasodium pyrophosphate (7722-88-5)
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Safety Information

Hazard Codes 
Xi,Xn
Risk Statements 
36/37/38-41-22
Safety Statements 
26-36-39
WGK Germany 
3
RTECS 
UX7350000
TSCA 
Yes
HS Code 
28353990
Hazardous Substances Data
7722-88-5(Hazardous Substances Data)

MSDS

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Tetrasodium pyrophosphate Usage And Synthesis

Description

Sodium pyrophosphate, also called Tetrasodium pyrophosphate or TSPP is used in the laboratory as a buffering agent. The compound has been shown to be useful in the preparation of an EDTA-sodium pyrophosphate extraction buffer for microcystin analysis of soil samples. Tetrasodium pyrophosphate is an odorless, white powder or granules. It is used in water softener, buffering agent, thickening agent, dispersing agent, wool de-fatting agent, metal cleaner, soap and synthetic detergent builder, general sequestering agent, in electrodeposition of metals. It also acts as a tartar control agent in toothpaste and dental floss. In addition, it is used as a chelating agent in antimicrobial studies. It is also used as a food additive in common foods such as chicken nuggets, crab meat and canned tuna.

Chemical Properties

white crystalline powder or colourless crystals

Uses

Tetrasodium Pyrophosphate is a coagulant, emulsifier, and sequestrant that is mildly alkaline, with a ph of 10. it is moderately soluble in water, with a solubility of 0.8 g/100 ml at 25°c. it is used as a coagulant in noncooked instant puddings to provide thicken- ing. it functions in cheese to reduce the meltability and fat separa- tion. it is used as a dispersant in malted milk and chocolate drink powders. it prevents crystal formation in tuna. it is also termed sodium pyrophosphate, tetrasodium diphosphate, and tspp.

Uses

Pharmaceutic aid.

Preparation

Tetrasodium pyrophosphate is formed when pure disodium hydrogen orthophosphate is heated to 500℃ for 5 hours. The product will contain better than 98 per cent Na4P2O7. Crystalline masses large enough for optical measurements are produced by heating in platinum to above the melting point of the tetrasodium pyrophosphate, 800°, and cooling slowly. Higher temperatures or longer heating times do not change the tetrasodium pyrophosphate, as this is the final product in the dehydration of disodium hydrogen orthophosphate.

General Description

Odorless, white powder or granules. Mp: 995°C. Density: 2.53 g cm-3. Solubility in water: 3.16 g / 100 mL (cold water); 40.26 g / 100 mL boiling water. Used as a wool de-fatting agent, in bleaching operations, as a food additive. The related substance Tetrasodium pyrophosphate decahydrate (Na4P2O7 0H2O) occurs as colorless transparent crystals. Loses its water when heated to 93.8°C.

Reactivity Profile

Tetrasodium pyrophosphate is basic. Reacts exothermically with acids. Incompatible with strong oxidizing agents. Decomposes in ethyl alcohol.

Hazard

Toxic by inhalation.

Safety Profile

Poison by ingestion, intraperitoneal, intravenous, and subcutaneous routes. It is not a cholinesterase inhibitor. When heated to decomposition it emits toxic fumes of POx and Na2O.

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Shanghai Aladdin Bio-Chem Technology Co.,LTD Gold
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J & K SCIENTIFIC LTD.
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Alfa Aesar
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