Overview
Tetrasodium pyrophosphate ( CAS 7722-88-5 ), commonly known as TSPP or designated E450(iii) in food applications, is an inorganic phosphate salt used across food processing, industrial cleaning, and construction sectors.
It functions primarily as a sequestrant, buffering agent, and dispersant, controlling metal ions and pH in complex formulations. In food manufacturing, TSPP acts as an emulsifying salt in processed cheese.
It also serves as a moisture-retention agent in seafood and meat products. Detergent and industrial cleaning formulators use it to sequester calcium and magnesium ions, preventing scale buildup and improving surfactant performance.
In hard-water conditions, it enhances cleaning efficiency. In cement and construction materials, it serves as a dispersant and set retarder, improving workability of cementitious mixes during the application process.
Water treatment operations apply TSPP to control metal ion precipitation and inhibit scale formation in process water systems. This ensures the longevity and efficiency of industrial piping and equipment.
Tetrasodium pyrophosphate is supplied as a white anhydrous powder or granules. Standard grades include food-grade ( FCC compliant) and technical-grade for various industrial applications and manufacturing needs.
Buyers sourcing for food or regulated end uses should confirm compliance with relevant regional food additive specifications. This ensures the material meets the necessary safety and quality requirements for the market.
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Physical Properties
| Melting Point | 988 °C |
| Boiling Point | 93.8 °C |
| Density | 2.534 g/cm³ |
| Appearance | white crystalline powder or colourless crystals |
| Color | White |
| Odor | Odorless |
| Form | Granular |
| Water Solubility | Soluble in water. Insoluble in ethyl alcohol. |
| Vapor Pressure | 0Pa at 20℃ |
| Log P | -3.42 |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H302 Harmful if swallowed H312 Harmful in contact with skin H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H332 Harmful if inhaled H335 May cause respiratory irritation H413 May cause long lasting harmful effects to aquatic life Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28353990 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 7722-88-5
- EC Number
- 231-767-1
- Mol. Weight
- 265.90
- HS Code
- 28353990
- Category
- Salts & Minerals