Sodium Tripolyphosphate (STPP)
CAS Number: 7758-29-4
Sodium tripolyphosphate (STPP) is a multifunctional builder in detergent formulations that sequesters hardness ions, softens water, suspends soil, buffers pH, and aids in removing fatty soils. It has been the industry-standard builder for decades in heavy-duty laundry powders and dishwasher detergents, though its use is increasingly regulated in some regions due to eutrophication concerns.
Technical Specifications
| whiteness | ≥87 |
| appearance | White powder or granules |
| moisture (%) | ≤0.5 |
| STPP content (%) | ≥94 |
| pH (1% solution) | 9.5–10.5 |
Applications
- Heavy-duty laundry powder formulations
- Automatic dishwasher detergents
- Industrial and institutional hard surface cleaners
- Metal surface treatment cleaners
- Ceramic and tile manufacturing cleaning
Key Features
- Multifunctional: chelation, softening, buffering, and soil suspension
- Significantly boosts surfactant detergency
- High-density granule grade available for compact formulas
- Cost-effective builder with proven track record
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CAS Number
7758-29-4
Category
Cleaning / Hygiene ChemicalsAvailability
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