Thiourea Dioxide vs Sodium Hydrosulphite

 Dasteck     |      2019-07-31 15:06:53

1. Product Features & Benefits

  • Superior Safety & Stability: Unlike traditional sodium hydrosulfite (SHS), Thiourea Dioxide (TD) poses no flammability risks upon contact with moisture. It exhibits excellent heat resistance and storage stability, with a milder decomposition rate even at high temperatures (80-100°C), making the process easier to control.

  • High Efficiency & Economy: TD boasts a high reduction potential of -1340mV. It is highly economical, generally requiring only 1/5th of the dosage of traditional reducing agents to achieve equivalent results.

  • Enhanced Fabric Quality: The controlled reduction process minimizes fiber damage and weight loss, effectively avoiding the effluent problems associated with sodium hydrosulfite.

  • Environmental Friendly: Fully biodegradable and pollution-free. TD is odorless, eliminating the irritating sulfurous gases released by SHS decomposition, thereby significantly improving the production environment.

  • Versatile Application: Suitable for stripping, clearing, and cleaning processes across most dye classes.

2. Technical Comparison: TD vs. Sodium Hydrosulfite

  • Reduction Potential: Thiourea Dioxide demonstrates a significantly higher reduction potential (-1340mV) compared to Sodium Hydrosulfite (-1080mV), a difference of 260mV.

  • Dosage Efficiency: The difference in critical dosage is substantial. To reach similar reduction effects, Sodium Hydrosulfite (85%) requires 15g/L, whereas Thiourea Dioxide (99%) requires only 5g/L.

  • Potency: To achieve the maximum reduction potential of Sodium Hydrosulfite (-1080mV), a minimal dosage of just 0.25g/L of Thiourea Dioxide (99%) is sufficient.