Hydrogen Peroxide (Pulp Bleaching Grade)
CAS Number: 7722-84-1
Hydrogen peroxide is the key oxidative bleaching agent in elemental chlorine-free (ECF) and totally chlorine-free (TCF) pulp bleaching processes. It is effective for brightening both chemical and mechanical pulps, particularly in alkaline peroxide bleaching stages. When used with chelating agents and silicate stabilizers, it delivers consistent brightness gain with minimal fiber degradation.
Technical Specifications
| appearance | Colorless transparent liquid |
| stability (%) | ≥ 97 |
| H₂O₂ content (%) | 27.5 / 35 / 50 |
| acidity (as H₂SO₄, g/L) | ≤ 0.04 |
Applications
- Alkaline peroxide bleaching of kraft and sulfite pulps
- Mechanical pulp (TMP/CTMP) brightening
- TCF bleaching sequence for specialty and dissolving pulp
- Oxidative extraction stage in multi-stage bleaching
- Recycled fiber decolorization and brightness improvement
Key Features
- Chlorine-free bleaching for environmentally preferred TCF and ECF processes
- Produces no toxic chlorinated byproducts in effluent
- Versatile for chemical, mechanical, and recycled fiber bleaching
- Used in combination with silicate and DTPA for stable performance
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