1. Product Description
FAS is a stable, non-toxic, and environmentally friendly reducing agent. It is widely used in the papermaking industry as an excellent alternative to Sodium Hydrosulfite. It provides superior performance in pulp bleaching and deinking processes, characterized by high reduction potential and excellent whiteness stability.
2. Physical Properties
Appearance: White crystalline powder
Chemical Name: Formamidine Sulfinic Acid (FAS)
Stability: Stable under dry conditions; decomposes in hot water or alkaline solutions to release sulfoxylic acid.
3. Key Advantages
High Efficiency: Offers higher reduction potential and better bleaching effects compared to Sodium Hydrosulfite.
Safety & Eco-friendly: Non-flammable, odorless, and safer to handle. It significantly reduces environmental pollution compared to traditional reducing agents.
Stability: Excellent storage stability, non-hygroscopic.
Cost-effective: Lower dosage requirement achieves the same bleaching effect, reducing overall chemical costs.
4. Applications & Recommended Dosage
FAS is suitable for bleaching of mechanical pulp, chemical pulp, and deinking of waste paper.
Application Process | Recommended Dosage | pH Condition | Temperature |
Pulp Bleaching | 0.05 - 0.3% (o.d. pulp) | Alkaline (pH 8-10) | 50 - 70°C |
Waste Paper Deinking | 0.1 - 0.5% (o.d. pulp) | Alkaline (pH 8-10) | 50 - 60°C |
*(Note: The specific dosage should be adjusted according to the pulp type and desired whiteness. A small-scale trial is recommended before mass production.)*
5. Quality Specification
Purity: ≥ 99.0%
Moisture: ≤ 0.1%
Iron(II): ≤ 10 ppm
Appearance: White crystalline powder
6. Storage and Handling
Store in a cool, dry, and well-ventilated area. Keep away from moisture, heat, and direct sunlight. Avoid contact with strong oxidizing agents. Please refer to the Safety Data Sheet (SDS) for detailed handling and first-aid measures.