A very important reason for salt for direct dyes acceleration effect is to reduce the dyeing process charge effect. Cellulose fibers with a neutral or weakly alkaline dyebath surface potential, the charge-generating repulsive anionic direct dye, sodium sulfate information, a large amount of positively charged sodium ions of the dye added to the electrolyte, and an anionic dye to maintain charge neutrality, the dyeing process to eliminate obstacles sodium sulfate, the dye molecules in close contact with the surface of the fiber brand sodium sulfate, reduced dye and fiber concentration difference near the interface, thereby increasing the percentage of dye in the dye. Chinese name English name Sodium sulfate sodium nickname thenardite, Na2SO4 anhydrous sodium sulfate formula molecular weight 142.06CAS Registry Number 7757-82-6EINECS Registration No. 231-820-9 Melting point 884 ℃ boiling point 1404 ℃ density 2.68-soluble soluble in water Appearance colorless crystals RTECS No. No. WE1650000PubChem 24852268 [] _ ??Sodium Sulfate Sodium Sulfate _ Rui Desheng Chemical relevant information provided by the 瑞德胜 chemical. Welcome to consult Weifang Rui Desheng Chemical Co. (www.ruidesheng.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Liqing Jie