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| CAS No.: | 7722-88-5 |
|---|---|
| Name: | Tetrasodium pyrophosphate |
| Molecular Structure: | |
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| Formula: | Na4O7P2 |
| Molecular Weight: | 265.90 |
| Synonyms: | 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; |
| EINECS: | 231-767-1 |
| Density: | 2.43 g/cm3 |
| Melting Point: | 80 °C |
| Boiling Point: | 93.8 °C |
| Solubility: | H2O: 0.1 M at 20 °C, clear, colorless |
| Appearance: | white crystalline powder or colourless crystals |
| Hazard Symbols: |
 Xi
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| Risk Codes: | 36/37/38 |
| Safety: | 26-36 |
| PSA: | 155.23000 |
| LogP: | 0.94120 |
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Consensus Reports
Reported in EPA TSCA Inventory.
Standards and Recommendations
OSHA PEL: TWA 5 mg/m3
ACGIH TLV: TWA 5 mg/m3
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:
(1)SMILES:[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O;
(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;
(3)Std. InChIKey:FQENQNTWSFEDLI-UHFFFAOYSA-J.
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. |