7722-88-5 Usage
Description
Tetrasodium pyrophosphate, also known as sodium pyrophosphate or TSPP, is an odorless, white powder or granules. It is a non-toxic and biocompatible compound with a mildly alkaline pH of 10 and moderate solubility in water.
Uses
Used in Laboratory Applications:
Tetrasodium pyrophosphate is used as a buffering agent in the preparation of an EDTA-sodium pyrophosphate extraction buffer for microcystin analysis of soil samples.
Used in Water Treatment:
Tetrasodium pyrophosphate is used as a water softener to prevent scale formation and as a general sequestering agent.
Used in Cleaning Products:
Tetrasodium pyrophosphate is used as a metal cleaner and a wool de-fatting agent.
Used in Food Industry:
Tetrasodium pyrophosphate is used as a food additive in common foods such as chicken nuggets, crab meat, and canned tuna. It functions as a coagulant in noncooked instant puddings to provide thickening, reduces meltability and fat separation in cheese, and prevents crystal formation in tuna.
Used in Pharmaceutical Aid:
Tetrasodium pyrophosphate is used as a pharmaceutic aid, an electroactive media for exfoliation of surface coatings, and an additive in the food industry.
Used in Redox Flow Batteries:
Tetrasodium pyrophosphate can be used as an inorganic additive to improve the stability and electrochemical performance of redox flow batteries.
Used in Dental Care:
Tetrasodium pyrophosphate acts as a tartar control agent in toothpaste and dental floss.
Used in Soap and Detergent Industry:
Tetrasodium pyrophosphate is used as a soap and synthetic detergent builder.
Used as a Dispersing and Emulsifying Agent:
Tetrasodium pyrophosphate is used as a dispersing and emulsifying agent in various applications, such as in malted milk and chocolate drink powders.
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.
Reactivity Profile
Tetrasodium pyrophosphate is basic. Reacts exothermically with acids. Incompatible with strong oxidizing agents. Decomposes in ethyl alcohol.
Hazard
Toxic by inhalation.
Health Hazard
Tetrasodium pyrophosphate
(TSPP) is of low toxicity, but the dust may be
irritating to the eyes, upper respiratory tract,
and skin.
Mild to moderate skin and eye irritation
have occurred with acute exposure to the dust.
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.
Check Digit Verification of cas no
The CAS Registry Mumber 7722-88-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,2 and 2 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 7722-88:
(6*7)+(5*7)+(4*2)+(3*2)+(2*8)+(1*8)=115
115 % 10 = 5
So 7722-88-5 is a valid CAS Registry Number.
InChI:InChI=1/4Na.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4
