7722-88-5
Product Name:
Tetrasodium pyrophosphate
Formula:
Na4O7P2
Synonyms:
Pyrophosphate inorganic;Sodium diphosphate tetrabasic;tetra-Sodium diphosphate decahydrate;Tetrasodium pyrophosphate;tetra-Sodium pyrophosphate, TSPP
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Tetrasodium pyrophosphate appears as odorless, white powder or granules. mp: 995 °C. Density: 2.53 g/cm3. Solubility in water: 3.16 g/100 mL (cold water); 40.26 g/100 mL boiling water. Used as a wool de-fatting agent, in bleaching operations, as a food additive. The related substance tetrasodium pyrophosphate decahydrate (Na4P2O7*10H2O) occurs as colorless transparent crystals. Loses its water when heated to 93.8 °C. |
|---|---|
| Color/Form | CRYSTALS |
| Odor | Odorless. |
| Boiling Point | Decomposes (NIOSH, 2023) |
| Melting Point | 1810 °F (NIOSH, 2023) |
| Solubility | 7 % at 77 °F (NIOSH, 2023) |
| Density | 2.45 (NIOSH, 2023) - Denser than water; will sink |
| Vapor Pressure | 0 mmHg (approx) (NIOSH, 2023) |
| Decomposition | When heated to decomp ... emits toxic fumes of /phosphorus oxides/. |
| pH | Between 9,8 and 10,8 (1 % solution) |
| Refractive Index | INDEX OF REFRACTION: 1.450, 1.453, 1.460 /DECAHYDRATE/ |
| Other Experimental Properties | AVAIL ALKALINITY AS NA2O 4.4%, TOTAL ALKALINITY 22.7% |
| Chemical Classes | Other Classes -> Salts, Basic |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H318:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 265.90 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 7 |
| Rotatable Bond Count | 0 |
| Exact Mass | 265.87100346 g/mol |
| Monoisotopic Mass | 265.87100346 g/mol |
| Topological Polar Surface Area | 136 Ų |
| Heavy Atom Count | 13 |
| Formal Charge | 0 |
| Complexity | 124 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 5 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Tetrasodium pyrophosphate appears as odorless, white powder or granules. mp: 995 °C. Density: 2.53 g/cm3. Solubility in water: 3.16 g/100 mL (cold water); 40.26 g/100 mL boiling water. Used as a wool de-fatting agent, in bleaching operations, as a food additive. The related substance tetrasodium pyrophosphate decahydrate (Na4P2O7*10H2O) occurs as colorless transparent crystals. Loses its water when heated to 93.8 °C.