| Product Name: | Tetrasodium pyrophosphate | Other Name: | Diphosphoric acid,sodium salt (1:4);Pyrophosphoric acid,tetrasodium salt;Diphosphoric acid,tetrasodium salt;Anhydrous tetrasodium pyrophosphate;Phosphotex;Tetrasodium diphosphate;Tetrasodium pyrophosphate;TSPP;Victor TSPP;Sodium pyrophosphate (Na4P2O7);Sodium pyrophosphate;Sodium diphosphate (Na4P2O7);Sodium phosphate (Na4P2O7);Tetrasodium pyrophosphate (Na4P2O7);Tetrasodium diphosphate (Na4P2O7);Sodium diphosphate;Accoline 126;SPP (phosphate);SPP;Thermphos Pyro E 450;Sodium phosphorus oxide (Na4P2O7);Phosphomix 110;Nankarin S 1;93269-17-1;156460-73-0;192507-07-6;1269628-79-6 |
| CAS No.: | 7722-88-5 | Molecular Formula: | H4O7P2.4Na |
| InChIKeys: | InChIKey=WTXQIGCNRZDSJU-UHFFFAOYSA-N | Molecular Weight: | 265.9 |
| Exact Mass: | 265.871002 | EC Number: | 231-767-1 |
| UNII: | O352864B8Z | ICSC Number: | 1140 |
| DSSTox ID: | DTXSID9042465 | Color/Form: | CRYSTALS|COLORLESS, TRANSPARENT CRYSTALS OR WHITE POWDER|White powder or granules. |
| HScode: | 28353990 | Categories: | Acidity Regulators |
| PSA: | 136 | XLogP3: | 0.94120 |
| Appearance: | White Granular | Density: | 3″>2.534 g/cm3 |
| Melting Point: | 988 °C | Boiling Point: | 93.8 °C |
| Refractive Index: | INDEX OF REFRACTION: 1.450, 1.453, 1.460 /DECAHYDRATE/|INDEX OF REFRACTION: 1.425 | Water Solubility: | soluble in water. Insoluble in ethyl alcohol.H2O: 0.1 M at 20 °C, clear, colorless |
| Storage Conditions: | Store at room temperature. | Vapor Pressure: | 0 mmHg (approx) |
| Flammability characteristics: | Noncombustible Solid | Odor: | Odorless. |
| PH: | Between 9,8 and 10,8 (1 % solution) | Experimental Properties: | AVAIL ALKALINITY AS NA2O 4.4%, TOTAL ALKALINITY 22.7%|MP: 79.5 °C; DENSITY: 1.82; PH OF 1% SOLN: 10.2 @ 25 °C /DECAHYDRATE/|HYDROLYZES TO ORTHOPHOSPHATE IN AQ SOLN, BUT RATE OF HYDROLYSIS IS MUCH SLOWER THAN FOR MORE ACID PYROPHOSPHATE; NO NOTICEABLE HYDROLYSIS WITHIN 60 HR AT 70 °C |
| Air and Water Reactions: | No rapid reaction with air No rapid reaction with water | Reactive Group: | Anhydrides |
| Reactivity Profile: | TETRASODIUM PYROPHOSPHATE is basic. Reacts exothermically with acids. Incompatible with strong oxidizing agents. Decomposes in ethyl alcohol. | Flammable Limits: | Noncombustible Solid |
Classification of the substance or mixture
Acute toxicity – Category 4, Oral
Serious eye damage, Category 1
GHS label elements, including precautionary statements
| Pictogram(s) |   |
|---|---|
| Signal word |
Danger |
| Hazard statement(s) |
H302 Harmful if swallowed H318 Causes serious eye damage |
| Precautionary statement(s) | |
| Prevention |
P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/… |
| Response |
P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help. |
| Storage |
none |
| Disposal |
P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal. |
Other hazards which do not result in classification
no data available
Precautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.