Tetrasodium pyrophosphate
CAS Number: 7722-88-5
Chemical Formula: Na4O7P2
Synonyms:
pyrophosphatedesodium
jiaolinsuanan
pyrophosphatetetrasodique
Appearance: White Powder
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Sodium pyrophosphate, often referred to as tetrasodium pyrophosphate or TSPP, serves as a buffering agent in laboratory settings. This substance is effective for making EDTA‑sodium pyrophosphate extraction buffers used in microcystin analysis of soil samples. It presents as an odorless, white powder or granular material.
Common applications include water softening, buffering, thickening, dispersing, wool degreasing, metal cleaning, and as a builder in soap and synthetic detergents. It also works as a general sequestering agent and supports metal electrodeposition processes. In oral care, it helps control tartar in toothpaste and dental floss. It acts as a chelating agent in antimicrobial research and is used as a food additive in products like chicken nuggets, crab meat, and canned tuna.
Parameters
| Melting point | 80 °C |
| Boiling point | 93.8 °C |
| density | 2.53 g/mL at 25 °C(lit.) |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | H2O: 0.1 M at 20 °C, clear, colorless |
| form | Granular |
| color | White |
| Specific Gravity | 2.534 |
| Odor | Odorless |
| PH Range | 10.3 |
| Water Solubility | Soluble in water. Insoluble in ethyl alcohol. |
| Sensitive | Hygroscopic |
| Merck | 14,9240 |
| Exposure limits | NIOSH: TWA 5 mg/m3 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| Cosmetics Ingredients Functions | BUFFERING CHELATING ANTICAKING ORAL CARE |
| 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 |
| InChIKey | FQENQNTWSFEDLI-UHFFFAOYSA-J |
| SMILES | [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O |
| LogP | -3.42 |
| CAS DataBase Reference | 7722-88-5(CAS DataBase Reference) |
| EPA Substance Registry System | Tetrasodium pyrophosphate (7722-88-5) |
Safety Information
| Hazard Codes | Xi,Xn |
| Risk Statements | 36/37/38-41-22 |
| Safety Statements | 26-36-39 |
| OEB | B |
| OEL | TWA: 5 mg/m3 |
| WGK Germany | 3 |
| RTECS | UX7350000 |
| TSCA | TSCA listed |
| HS Code | 28353990 |
| Storage Class | 13 – Non Combustible Solids |
| Hazard Classifications | Acute Tox. 4 Oral Eye Dam. 1 |
| Hazardous Substances Data | 7722-88-5(Hazardous Substances Data) |
Product Application
Tetrasodium pyrophosphate is a mildly alkaline coagulant, emulsifier, and sequestrant with a pH value around 10. It dissolves moderately in water, with solubility near 0.8 g per 100 mL at 25 °C. It is used to thicken instant pudding mixes, control melting and fat separation in cheese, improve dispersion in milk and chocolate drink powders, and stop crystal formation in canned tuna. It is also known as sodium pyrophosphate, tetrasodium diphosphate, or TSPP.
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