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In modern chemical manufacturing and industrial formulation, selecting the right sequestering and buffering agent is critical to product performance and cost efficiency. Tetrasodium Pyrophosphate (TSPP) , with the chemical formula Na₄P₂O₇, stands out as a highly versatile inorganic alkaline salt. Licensed under the Chemical Abstracts Service as CAS 7722-88-5 (Anhydrous) and CAS 13472-36-1 (Decahydrate) , industrial grade TSPP is widely utilized across detergents, water conditioning, metal treatment, and ceramic processing.
As a leading TSPP manufacturer, Sherlock Chemical delivers premium-grade materials manufactured in strict compliance with the international standard HG/T 2968-2009. This comprehensive guide explores the technical specifications, key industrial mechanisms, and application fields that make TSPP indispensable for worldwide industrial buyers.
To ensure process stability, industrial buyers must evaluate the purity, water-insoluble matter, and pH limits of the chemical profile. Under the HG/T 2968-2009 specification, industrial grade TSPP is categorized into two distinct forms to match specific processing lines:
| Technical Parameter | Anhydrous TSPP (Na₄P₂O₇) | Decahydrate TSPP (Na₄P₂O₇·10H₂O) |
|---|---|---|
| Main Content (Na₄P₂O₇) w/% | ≥ 96.5% | ≥ 98.0% |
| Water Insoluble Matter w/% | ≤ 0.15% | ≤ 0.10% |
| pH Value (10g/L aqueous solution) | 9.9 – 10.7 | 9.9 – 10.7 |
| Orthophosphate Test | Pass | Pass |
Behind this specification sheet stands a team with over ten years of hands-on experience in industrial phosphate exports — not just processing documents, but understanding how real-world variables like water hardness, temperature drift, and blending sequences affect your final product. Our in-house technical analysts routinely review customer process conditions and recommend adjustments before trial batches are run.
Sourcing Insight: Anhydrous TSPP features a higher bulk density, making it the standard preference for powder detergent blending and dry high-temperature processes due to lower unit active costs. Conversely, Decahydrate TSPP is favored in sensitive blending formulations where low dust emission and high initial crystal purity are required.
| Aspect | Anhydrous | Decahydrate |
|---|---|---|
| Purity (as Na₄P₂O₇) | ≥96.5% | ≥98.0% |
| Water insolubles | ≤0.15% | ≤0.10% |
| Typical use | Powder detergents, electroplating | Sensitive blending, low-dust processes |
| Cost per unit active | Lower | Higher |
If your process tolerates a small amount of hydrated water, decahydrate gives higher purity. If you need high alkalinity density per ton of product, anhydrous TSPP is the standard choice.
The extensive commercial demand for industrial grade Na₄P₂O₇ stems from three foundational chemical properties:
Ion Sequestration (Hard Water Mitigation): TSPP possesses exceptional chelating capabilities. It actively binds with hardness ions such as Calcium Ca⊃2;⁺ and Magnesium Mg⊃2;⁺ in aqueous solutions. By forming stable, water-soluble complexes, it prevents these ions from reacting with surfactants, eliminating scale formation and soap scum in industrial boilers and washing equipment.
Alkaline pH Buffering: Maintaining a stable pH is vital for chemical reactions and cleaning efficacy. TSPP stabilizes the alkaline matrix between a pH of 9.9 and 10.7. It resists pH drift when acidic soils or compounds are introduced, ensuring optimal performance throughout the processing cycle.
Deflocculation and Particle Dispersion: TSPP reduces the viscosity of mineral slurries and clay bodies by altering surface charges. It acts as an effective deflocculant, preventing the agglomeration and redeposition of fine suspended particles on surfaces.
In institutional and industrial cleaning, TSPP acts as a powerful detergent builder. It boosts surfactant efficiency in hard water, stabilizes bleaching systems, and facilitates the removal of heavy grease and particulate soils from fabrics and machinery surfaces without leaving mineral residues.
For ceramic manufacturing, TSPP is a vital clay stabilizer. In the preparation of ceramic slips and glazes, adding minute percentages of industrial-grade TSPP dramatically improves slurry fluidity. This enables higher solids loading with less water, reducing drying times, energy costs, and cracking defects in the final kiln firing.
During metal finishing, TSPP serves as an advanced complexing agent in copper and tin electroplating baths. It regulates the ion deposition rate, resulting in a highly uniform, smooth, and cohesive metallic coating while suppressing the accumulation of sludge in the tanks.
In the oilfield industry, water-based drilling muds rely on TSPP as a viscosity reducer. It breaks down mud cakes and controls the rheological properties of drilling fluids when traversing heavy clay formations, ensuring smooth drilling operations.
Standard packaging: 25 kg PP/PE composite bags with moisture‑proof liners
Palletization: Optional, available upon request
MOQ: From 1 MT to full container (FCL)
Documents: COA, MSDS, packing list, bill of lading
Third‑party inspection: SGS, BV, or as requested
Premium packing resilience guarantees that the product arrives free of clumping and contamination.
Industrial Grade Tetrasodium Pyrophosphate (TSPP) meeting HG/T 2968-2009 and registered under CAS 7722-88-5 (anhydrous) / CAS 13472-36-1 (decahydrate) delivers:
Main content ≥96.5% (anhydrous) / ≥98.0% (decahydrate)
Water insoluble ≤0.15% / 0.10%
pH 9.9–10.7, orthophosphate pass
Core functions: sequestration, buffering, deflocculation
Proven in detergents, ceramics, electroplating, water treatment, drilling
Streamline your production and secure your chemical supply chain.
Tell us your application, and we will recommend the right anhydrous or decahydrate TSPP. Request a customized quote, batch‑specific COAs, or laboratory testing samples.
Q1: What are the CAS numbers for industrial TSPP?
A1: CAS 7722-88-5 for anhydrous TSPP (Na₄P₂O₇) and CAS 13472-36-1 for decahydrate TSPP (Na₄P₂O₇·10H₂O).
Q2: What is the difference between TSPP anhydrous and decahydrate per HG/T 2968-2009?
A2: Anhydrous has ≥96.5% Na₄P₂O₇ with water insoluble ≤0.15%; decahydrate has ≥98.0% with ≤0.10% water insoluble, but contains crystal water and offers lower dust emission.
Q3: Can TSPP be used in ceramic slip preparation?
A3: Yes. TSPP is an effective deflocculant for ceramic slips, improving fluidity and enabling higher solids loading with less water, which reduces drying time and cracking defects.
Q4: Is orthophosphate testing really required?
A4: Yes, per HG/T 2968-2009. High orthophosphate indicates product degradation and reduces buffering performance.
Q5: Can your team provide on-site technical support?
A5: Yes, on-site guidance is available for troubleshooting applications such as sludge formation in electroplating or deflocculant adjustment in ceramic processing.
