Trisodium Phosphate (TSP) CAS 7601-54-9 Powder Granular
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Trisodium Phosphate (TSP) CAS 7601-54-9
Trisodium Phosphate (TSP) is an inorganic chemical compound widely used in industrial and food processing applications.
Aliases
The compound is known by several industry aliases including Tribasic Sodium Phosphate, Trisodium Orthophosphate, and Sodium Phosphate.
Chemical Formula
Na₃PO₄ (Anhydrous) or Na₃PO₄·12H₂O (Dodecahydrate).
Appearance
Available in White Crystalline Powder, White Granular, and White Flake forms.
Product Description
Trisodium Phosphate (TSP) is highly soluble in water and insoluble in ethanol, with an alkaline aqueous solution. The dodecahydrate form appears as colorless or white transparent crystals, while the anhydrous form is a white powder. It exhibits strong alkalinity, with a 1% aqueous solution pH of 11.5–12.5, and is non-corrosive and non-hazardous for standard industrial applications.
Physical & Chemical Properties
| Property | Specification |
|---|---|
| Appearance | White Crystalline Powder / Granular / Flake |
| Solubility | Freely soluble in water; insoluble in ethanol |
| pH (1% Aqueous Solution) | 11.5 – 12.5 |
| Density (Anhydrous) | 2.536 g/cm³ |
| Density (Dodecahydrate) | 1.62 g/cm³ |
| Melting Point (Dodecahydrate) | 73.4 °C |
| Molecular Weight (Anhydrous) | 163.94 g/mol |
| Molecular Weight (Dodecahydrate) | 380.14 g/mol |
Industrial Grade Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Main Content (Na₃PO₄·12H₂O) | ≥ 98.0% | Gravimetric |
| Water Insoluble Matter | ≤ 0.1% | Gravimetric |
| Chloride (as Cl) | ≤ 0.4% | Turbidimetric |
| Sulfate (as SO₄) | ≤ 0.5% | Turbidimetric |
| Iron (as Fe) | ≤ 0.01% | Colorimetric |
Main Applications
Water Treatment: Effective water softener and boiler scale inhibitor, preventing scale buildup in industrial boilers and cooling systems.
Industrial Cleaning: Powerful degreaser and cleaning agent for metal surfaces, ceramics, and food processing equipment.
Textile Industry: Used as a dyeing auxiliary, pH regulator, and fabric softener in textile printing and dyeing processes.
Food Processing: As a food additive (E339(iii)) for buffering, emulsification, and quality improvement in food production.
Paper Making: Serves as a sizing agent and pH adjuster in paper manufacturing to enhance paper strength and quality.
Regulatory & Safety Information
Trisodium Phosphate (TSP) has completed REACH registration and complies with EU chemical regulations. A MSDS download is available for detailed safety, handling, and storage guidelinesECHA.
FAQ
What forms of Trisodium Phosphate are available?Available forms include white crystalline powder, granular, and flake, with the dodecahydrate being the most common commercial form.
Is Trisodium Phosphate safe for food contact?Food-grade Trisodium Phosphate is safe for food processing when used in accordance with food safety standards, with strict limits on heavy metals and impurities.
How should Trisodium Phosphate be stored?Store in a cool, dry, and well-ventilated area away from incompatible substances. Keep containers tightly closed to prevent moisture absorption, which can affect product quality.
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