Sulfoisophthalic Acid Monosodium Salt CAS 6362-79-4
5-Sulfoisophthalic acid monosodium salt (CAS 6362-79-4, English name: 5-sulfoisophthalic acid monosodium (salt) is an important organic synthetic intermediate, belonging to sulfonated modified aromatic dicarboxylic acid derivatives. Its molecular structure is based on isophthalic acid as the parent group, with a sulfonic acid group (-SO₃H) introduced at position 5 of the benzene ring and forming a salt with sodium.
From the perspective of physical and chemical properties, 5-Sulfoisophthalic acid monosodium salt usually appears as a white powder, with a melting point of 373℃. At 20℃, its density is 1.87, and it has good water solubility (380g/L). At 20℃, its acidity coefficient (pKa) is 4.1, and at 23℃, its LogP is -1.7. Overall. Sodium m-5-sulfonate is stable in nature and readily soluble in water, making it suitable for water-based system application scenarios.
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ITEM |
STANDARD |
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Appearance |
White needle-like crystals |
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Purity |
≥99% |
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Melting point |
129-132℃ |
1. Field of polymer materials
5-Sulfoisophthalic acid monosodium salt is used as a copolymer monomer for the production of "modified polyester" : copolymerized with terephthalic acid and ethylene glycol, and sodium sulfonate groups are introduced to improve the hydrophilicity and dyeability of polyester, which is used to manufacture easily dyeable polyester fibers and water-based polyester coatings.
Preparation of "ion exchange resin" : Carboxyl groups and sodium sulfonate groups can be used as ion exchange groups for the synthesis of water softening and heavy metal ion adsorption resins.
2. Textile printing and dyeing field
As a "leveling agent" : In the dyeing of synthetic fibers such as polyester and nylon, adding sodium isophthalic acid 5-sulfonate can regulate the dye uptake rate, avoid uneven dyeing, and improve the uniformity and color fastness of fabric dyeing
3. Coatings and adhesives field.
For "water-based coatings" : As a functional additive, 5-Sulfoisophthalic acid monosodium salt improves the dispersion and water resistance of the coating, reduces the delamination of the coating, and enhances the adhesion between the coating and the substrate.
Modified "water-based adhesive" : Copolymerized with acrylate, 5-Sulfoisophthalic acid monosodium salt enhances the weather resistance and flexibility of the adhesive, suitable for bonding materials such as wood and plastic.
1 Wide application value;
2 Mild performance;
3 The practicality of organic synthesis intermediates
25kgs/bag, 20tons/20’container
Sulfoisophthalic Acid Monosodium Salt CAS 6362-79-4
Sulfoisophthalic Acid Monosodium Salt CAS 6362-79-4
