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Tetrasodium pyrophosphate

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Tetrasodium pyrophosphate

EINECS 231-767-1
CAS No. 7722-88-5 Density 2.43 g/cm3
Solubility H2O: 0.1 M at 20 °C, clear, colorless Melting Point 80 °C
Formula Na4O7P2 Boiling Point 93.8 °C
Molecular Weight 265.90 Flash Point
Transport Information Appearance white crystalline powder or colourless crystals
Safety 26-36 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 7722-88-5 (Tetrasodium pyrophosphate) Hazard Symbols IrritantXi

Diphosphoricacid, tetrasodium salt (9CI);Pyrophosphoric acid, tetrasodium salt (8CI);Accoline 126;Anhydrous tetrasodium pyrophosphate;Phosphotex;SPP;SPP(phosphate);Sodium diphosphate;Sodium diphosphate (Na4P2O7);Sodium phosphate(Na4P2O7);Sodium pyrophosphate;Sodium pyrophosphate (Na4P2O7);TSPP;Tetrasodium diphosphate;Tetrasodium diphosphate (Na4P2O7);Diphosphoricacid, sodium salt (1:4);Tetrasodium pyrophosphate (Na4P2O7);Thermphos Pyro E 450;Victor TSPP;Tetra Sodium Pyrophosphate;


Tetrasodium pyrophosphate Consensus Reports

Reported in EPA TSCA Inventory.

Tetrasodium pyrophosphate Standards and Recommendations

OSHA PEL: TWA 5 mg/m3
ACGIH TLV: TWA 5 mg/m3

Tetrasodium pyrophosphate Specification

 The Tetrasodium pyrophosphate, with the CAS registry number 7722-88-5, is also known as Diphosphoric acid tetrasodium salt; Pyrophosphoric acid tetrasodium salt; Sodium diphosphate.It belongs to the product inorganic salts. Its EINECS number is 231-767-1.This chemical's molecular formula is Na4P2O7 and molecular weight is 265.90. What's more,Its systematic name is Tetrasodium pyrophosphate. It is Used as printing and dyeing bleaching agent, softener, etc.

Physical properties about Tetrasodium pyrophosphate are:(1)ACD/LogP: -3.42; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -7.96; (4)ACD/LogD (pH 7.4): -8.64; (5)ACD/BCF (pH 5.5): 1.00; (6)ACD/BCF (pH 7.4): 1.00; (7)#H bond acceptors: 7; (8)#H bond donors: 4; (9)#Freely Rotating Bonds: 2.

The Tetrasodium pyrophosphate may cause damage to health. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell seek medical advice immediately .

Tetrasodium pyrophosphate (CAS NO.7722-88-5) is manufactured by reacting phosphoric acid and soda ash to yield a disodium phosphate solution, which may be dried to give anhydrous disodium phosphate (Na2HPO4) or crystallized to give disodium phosphate dihydrate (Na2HPO4.2H2O) or disodium phosphate heptahydrate (Na2HPO4.7H2O).
These compounds are calcined at a high temperature in an oil-fired or gas-fired rotary kiln to yield tetrasodium pyrophosphate (Fig. l).
2Na2HPO4 → Na4P2O7 + H2O
2Na2HPO4.2H2O → Na4P2O7 + 5H2O

FIGURE 3 Manufacture of sodium polyphosphate.

You can still convert the following datas into molecular structure:
(2)Std. InChI:InChI=1S/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;

The toxicity data of Tetrasodium pyrophosphate as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intravenous 69mg/kg (69mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 445, 1957.
mouse LD50 oral 2980mg/kg (2980mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 445, 1957.
mouse LD50 subcutaneous 400mg/kg (400mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 445, 1957.
rabbit LD skin > 300mg/kg (300mg/kg)   Acute Toxicity Data. Journal of the American College of Toxicology, Part B. Vol. 1, Pg. 47, 1990.
rat LD50 intraperitoneal 59mg/kg (59mg/kg) BEHAVIORAL: EXCITEMENT Journal of Pharmacology and Experimental Therapeutics. Vol. 108, Pg. 117, 1953.
rat LD50 intravenous 100mg/kg (100mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 172, 1957.
rat LD50 oral 4gm/kg (4000mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 172, 1957.

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