Sodium Pyrophosphate Decahydrate (CAS 13472-36-1): Comprehensive Technical Guide
Table of Contents
1. Product Overview & Comparative Analysis
Key Specifications
Parameter | Sodium Pyrophosphate Decahydrate | Anhydrous Form |
---|---|---|
CAS Number | 13472-36-1 | 7722-88-5 |
Molecular Formula | Na4P2O7·10H2O | Na4P2O7 |
Molecular Weight | 446.06 g/mol | 265.90 g/mol |
Appearance | Colorless monoclinic crystals/white powder | White crystalline powder |
Density | 1.82 g/cm3 | 2.45 g/cm3 |
Melting Point | 80°C (dehydration) | 988°C |
Solubility (20°C) | 62 g/L in water | Highly soluble |
pH (1% solution) | 10.0–10.2 | 10.2–10.8 |
Critical Note: The decahydrate form demonstrates superior hydration stability for controlled-release applications compared to anhydrous variants.
2. Industrial & Commercial Applications
Core Functional Properties
- Metal ion chelation capacity (Ca2+, Mg2+ sequestration)
- pH buffering in alkaline environments
- Dispersion stabilization in colloidal systems
- Water softening through scale inhibition
Sector-Specific Implementations
Industry | Application Detail | Performance Benefit |
---|---|---|
Water Treatment | Boiler scale prevention (0.5–2.0 ppm concentration) | Reduces maintenance downtime by 40% |
Food Processing | Emulsifier in dairy products (0.3–0.5% w/w) | Extends shelf life by 15–20 days |
Electroplating | Copper complexation in bath solutions (15–25 g/L) | Improves deposition uniformity (Ra ≤0.8μm) |
Detergent Manufacturing | Builder in synthetic formulations (8–12% content) | Enhances cleaning efficiency by 30% vs. STPP |
3. Implementation Case Studies
Case A: Municipal Water Softening System
Challenge: Hard water (250 ppm CaCO3) causing pipe scaling in 50,000-resident municipality.
Solution: 1.2 ppm continuous feed of sodium pyrophosphate decahydrate.
Outcome: 92% scale reduction with 18-month ROI through energy savings.
Case B: Canned Seafood Processing
Challenge: Texture degradation in tuna products during retort processing.
Solution: 0.4% brine solution additive for protein stabilization.
Outcome: 35% improvement in product firmness scores (ASTM D1894).
4. Verified Client Success Stories
Client 1: Shanghai Sigma Biochemical Co., Ltd.
Application: Laboratory-grade reagent for metal analysis
Volume: 800 kg/month (99.9% purity)
Feedback: "Consistent batch quality meeting USP-NF specifications for trace metal testing."
Client 2: Wujiang Shenlong Chemical Co.
Application: Industrial detergent production
Volume: 12 metric tons/quarter
Result: Achieved 28% cost reduction versus tripolyphosphate alternatives.
5. Procurement & Technical Inquiry
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