Sodium Tripolyphosphate Ceramic Deflocculant
CAS Number: 7758-29-4
Sodium tripolyphosphate (STPP) is a classic inorganic deflocculant used in porcelain, sanitaryware, and whiteware slip casting. By adsorbing onto clay particle surfaces and increasing zeta potential, STPP reduces slip viscosity at minimal additions (0.1–0.5 wt%), enabling high solids-loading slips for efficient slip casting and glaze preparation.
Technical Specifications
| appearance | White granular powder |
| purity (%) | ≥94 |
| moisture (%) | ≤0.5 |
| P2O5 content (%) | 57–58 |
| pH (1% solution) | 9.5–10.5 |
Applications
- Deflocculant for porcelain and sanitaryware slip casting
- Viscosity reducer in whiteware and bone china slips
- Glaze preparation dispersant
- Deflocculant in floor and wall tile body slips
- Combined with sodium silicate for optimized deflocculation
Key Features
- Effective at very low dosages (0.1–0.5%) reducing additive costs
- Raises zeta potential on clay surfaces for stable, low-viscosity slips
- Works synergistically with sodium silicate for optimal results
- Improves casting rate and green density in slip-cast ware
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CAS Number
7758-29-4
Category
Ceramic / Glass AdditivesAvailability
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