Description

5-Sulfoisophthalic Acid Monosodium Salt is a high-purity, water-soluble aromatic sulfonate derivative, valued for its ability to introduce sulfonate functionality and enhance hydrophilicity in polymer systems. This compound serves as a critical monomer and intermediate, enabling the synthesis of specialized polymers with improved dyeability, antistatic properties, and ionic character. It is essential for manufacturers in the production of specialty polyesters, photographic chemicals, and advanced material coatings.

Application

• As a sulfoisophthalate comonomer in the synthesis of water-dispersible and cationic dyeable polyesters (CDP) for textiles.
• Key intermediate for manufacturing photographic chemicals and light-sensitive materials.
• Production of ion-exchange resins and membranes with enhanced selectivity.
• Used in the formulation of specialty surfactants and dispersants for industrial applications.
• Modifier for polymer electrolytes and conductive materials in advanced battery systems.
• Component in paper sizing agents and coating additives to improve performance.
• Precursor for pharmaceutical intermediates requiring sulfonated aromatic structures.
• Additive in ceramic and electroplating processes to control solution properties.

Basic Information

Product Name	5-Sulfoisophthalic Acid Monosodium Salt
CAS No.	6362-79-4
Molecular Formula	C8H5NaO7S
Molecular Weight	268.17 g/mol
Synonyms	5-Sodiosulfoisophthalic Acid; Sodium 5-Sulfoisophthalate; Monosodium 5-Sulfoisophthalate; 5-Sulfoisophthalic Acid Sodium Salt; SIP-Na; SIPMS; 1,3-Benzenedicarboxylic acid, 5-sulfo-, monosodium salt; 5-Carboxy-2-sulfobenzoic Acid Sodium Salt
EINECS	228-875-1

Quality Control

Our 5-Sulfoisophthalic Acid Monosodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications, including purity, sulfonate content, and impurity profiles. Certificates of Analysis (COA) documenting these results are provided to guarantee batch-to-batch consistency and compliance with customer requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept sealed to minimize exposure to atmospheric moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Sulfonate Content	Contact for details
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
pH (5% Solution)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.