Sequestering Agent EDTA Tetrasodium Salt
CAS Number: 64-02-8
EDTA Tetrasodium Salt is a powerful chelating agent that sequesters calcium, magnesium, iron, and copper ions in textile dyeing and finishing process water. It prevents metal ion interference that causes dye precipitation, color change, and fabric damage in bleaching and dyeing baths. Essential in hard water regions and in peroxide bleaching to stabilize hydrogen peroxide.
Technical Specifications
| appearance | White crystalline powder |
| moisture (%) | ≤2 |
| pH (1% solution) | 10.5–11.5 |
| active content (%) | ≥99 |
| heavy metals (ppm) | ≤10 |
| chelating value (mg CaCO3/g) | ≥200 |
Applications
- Water softening in dyeing and finishing process baths
- Stabilizing H2O2 bleaching baths by sequestering iron and copper
- Preventing dye precipitation in reactive and acid dye baths
- Pre-treatment chelation wash before dyeing for uniform results
- Sequestering agent in textile printing paste to prevent metal interference
Key Features
- Broad-spectrum chelation of Ca2+, Mg2+, Fe2+/3+, Cu2+, Mn2+
- Prevents catalytic decomposition of H2O2 by iron in bleaching
- Effective at low dosages (1–3 g/L) for economical use
- Available as food-grade quality for sensitive textile end uses
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CAS Number
64-02-8
Category
Textile Dyeing AuxiliariesAvailability
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