Sodium Toluene Sulfonate (STS)
CAS Number: 657-84-1
Sodium toluene sulfonate (STS) is a hydrotrope that improves the clarity and water-solubility of formulations containing high levels of surfactants or other sparingly soluble ingredients. It is particularly valued in personal care products and transparent cleaning gels where optical clarity is critical. STS also has mild wetting properties that contribute to cleaning performance.
Technical Specifications
| appearance | White crystalline powder or clear liquid |
| active matter (%) | ≥95 (powder) or ≥40 (liquid) |
| pH (10% solution) | 6.5–8.5 |
| heavy metals (ppm) | ≤10 |
| sodium sulfate (%) | ≤1.5 |
Applications
- Transparent shower gel and shampoo
- Clear liquid dish soap
- Personal care gel formulations
- Transparent industrial cleaners
- Concentrated liquid detergents
Key Features
- Excellent clarity improvement in transparent formulations
- Effective hydrotrope at relatively low doses
- Safe for use in personal care products
- Aids in viscosity control and processing
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CAS Number
657-84-1
Category
Cleaning / Hygiene ChemicalsAvailability
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