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High Purity Sodium Polyphosphate (CAS 68915-31-1) for Water Softening, Sequestration, and Food-Grade Applications
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High Purity Sodium Polyphosphate (CAS 68915-31-1) for Water Softening, Sequestration, and Food-Grade Applications
| MOQ: | 500g, 1kg or 25kg for sample, 1000kg for commercial order |
| Standard Packaging: | Net Weight 25kg or 200kg/package |
| Delivery Period: | In 3 working days |
| Payment Method: | T/T,LC,OA |
| Supply Capacity: | 3000 Tons/month |
Detail Information
Place of Origin
Shanxi, China
Brand Name
Zorui
Certification
ISO, COA, MSDS, TDS, AAA
Model Number
68915-31-1
Name:
Sodium Polyphosphate
CAS No.:
68915-31-1
Sample:
Available
Port:
Tianjin, Shanghai, Qingdao, Other Ports In China
Trade Term:
EXW, DAP, FOB, CFR, CIF, CPT, CIP
Shipping:
Sample By Express, 100kg+ By Air, 1000kg+ By Sea
Storage:
Cool, Dry, And Well-ventilated Area; Avoid Moisture And High Heat
Product Description
Sodium Polyphosphate (CAS 68915-31-1)
Sodium polyphosphate (CAS 68915-31-1) is a high-purity inorganic polymer composed of chains of phosphate units linked together, with sodium ions as counterions. This versatile chemical is widely recognized for its exceptional water-softening, sequestering, and dispersing properties. It serves as a key ingredient in numerous industrial and consumer applications due to its ability to bind metal ions, prevent scale formation, and enhance cleaning efficiency. Available in various grades, including food-grade and technical-grade, sodium polyphosphate is an essential additive in water treatment, food processing, detergents, and ceramics.
Physical and Chemical Specifications
| CAS Number | 68915-31-1 |
|---|---|
| Chemical Formula | (NaPO₃)ₙ |
| Appearance | White crystalline powder or granules |
| Odor | Odorless |
| Solubility | Freely soluble in water; insoluble in organic solvents |
| pH (1% solution) | 6.0-8.5 |
| Bulk Density | 0.7-1.2 g/cm³ |
| Moisture Content | ≤ 1.0% |
| P₂O₅ Content | 60-65% |
| Melting Point | Approx. 600°C (decomposes) |
| Storage Conditions | Store in a cool, dry, well-ventilated area away from moisture and incompatible substances |
Product Functions
- Sequestration: Binds calcium, magnesium, and other metal ions to prevent scale and improve water quality.
- Dispersion: Breaks down and suspends particles, preventing redeposition in cleaning applications.
- Emulsification: Aids in stabilizing emulsions in food and industrial processes.
- pH Buffering: Maintains stable pH levels in solutions.
- Corrosion Inhibition: Protects metal surfaces by forming a protective layer.
- Water Softening: Reduces water hardness for enhanced efficiency in detergents and boilers.
Application Areas
- Water Treatment: Used in municipal and industrial water softening, boiler and cooling system treatment.
- Food Industry: Acts as an emulsifier, texture modifier, and preservative in processed meats, seafood, and dairy products.
- Detergents & Cleaners: Enhances cleaning power in laundry detergents, dishwashing agents, and industrial cleaners.
- Ceramics & Textiles: Serves as a dispersant and binder in ceramic glazes and textile processing.
- Oil & Gas: Applied in drilling fluids and as a scale inhibitor.
- Agriculture: Used in fertilizer formulations and as a soil conditioner.
Manufacturing Process
Sodium polyphosphate is produced through the thermal polymerization of sodium dihydrogen phosphate (NaH₂PO₄) or disodium hydrogen phosphate (Na₂HPO₄). The process involves:
- Raw Material Preparation: High-purity phosphate salts are selected and dried.
- Heating & Polymerization: The phosphate salts are heated to temperatures between 300-600°C in a controlled environment, leading to condensation and chain formation.
- Cooling & Grinding: The molten product is rapidly cooled to form a glassy solid, which is then milled into powder or granules.
- Quality Control: The final product undergoes rigorous testing for parameters such as chain length, P₂O₅ content, solubility, and purity to ensure compliance with industry standards.
Why Choose Us
- High Purity & Consistency: Our sodium polyphosphate meets stringent quality standards, ensuring reliable performance in every batch.
- Customizable Grades: We offer tailored formulations to suit specific industrial needs, including food-grade, technical-grade, and high-polymer variants.
- Competitive Pricing: Direct manufacturing allows us to provide cost-effective solutions without compromising quality.
- Technical Support: Our expert team offers comprehensive application guidance and after-sales support.
- Global Logistics: Efficient supply chain and packaging options ensure timely delivery worldwide.
- Certifications: Compliant with ISO, REACH, FDA (for food-grade), and other international regulations.
Frequently Asked Questions
Q1: What is the difference between sodium polyphosphate and sodium tripolyphosphate?
A1: Sodium polyphosphate is a general term for polymers of phosphate, while sodium tripolyphosphate (STPP) is a specific short-chain polyphosphate (n≈3). Sodium polyphosphate typically has longer chains and different functional properties.
Q2: Is sodium polyphosphate safe for food applications?
A2: Yes, food-grade sodium polyphosphate is Generally Recognized as Safe (GRAS) by the FDA and approved for use as an emulsifier, stabilizer, and preservative in various food products.
Q3: How should sodium polyphosphate be stored?
A3: Store in a cool, dry place, sealed in moisture-proof containers. Avoid exposure to humidity to prevent caking or degradation.
Q4: Can sodium polyphosphate be used in combination with other chemicals?
A4: Yes, it is often used with surfactants, builders, and other additives to enhance performance in detergents, water treatment, and industrial processes.
Q5: What is the shelf life of sodium polyphosphate?
A5: When stored properly, it has a shelf life of up to 2 years. Always check the manufacturer's guidelines and conduct quality tests if stored for extended periods.
Q6: Is sodium polyphosphate environmentally friendly?
A6: It is biodegradable under appropriate conditions. However, its use should comply with local environmental regulations to prevent eutrophication in water bodies.
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