Description

1,4-Benzenedicarboxylic Acid, 2-Sulfo- is a specialized sulfonated aromatic dicarboxylic acid, serving as a key multifunctional intermediate in advanced chemical synthesis. Its unique structure, featuring both carboxylic acid and sulfonic acid groups, provides valuable solubility and reactivity for creating high-performance materials. This compound is essential for manufacturers in the polymer, dye, and pharmaceutical industries seeking to develop products with enhanced properties.

Application

• Polymer Modification: Acts as a monomer or comonomer for synthesizing sulfonated polyesters and polyamides, imparting improved hydrophilicity, dyeability, and ion-exchange capacity.
• Dye and Pigment Intermediate: Used in the production of water-soluble dyes and high-performance pigments, where the sulfonic acid group enhances solubility and color fastness.
• Pharmaceutical Synthesis: Serves as a building block for active pharmaceutical ingredients (APIs) and prodrugs requiring specific solubility or ionic characteristics.
• Chelating Agent Precursor: Utilized in the manufacture of specialized chelating agents and metal ion complexants for water treatment and industrial processes.
• Crosslinking Agent: Functions in resin and coating formulations to introduce crosslinking sites, improving film hardness and chemical resistance.
• Research & Development: A valuable reagent in organic and materials chemistry research for developing novel functional molecules and polymers.

Basic Information

Product Name	1,4-Benzenedicarboxylic Acid, 2-Sulfo-
CAS No.	4991-22-4
Molecular Formula	C8H6O7S
Molecular Weight	246.19 g/mol
Synonyms	2-Sulfoterephthalic Acid; 2-Sulfo-1,4-Benzenedicarboxylic Acid; 5-Sulfoisophthalic Acid; Terephthalic Acid-2-sulfonic Acid; 2-Carboxy-5-sulfobenzoic Acid; 4-Sulfophthalic Acid; Monosulfoisophthalic Acid; Sulfoisophthalic Acid (SIPA)
EINECS	225-661-1

Quality Control

Our 1,4-Benzenedicarboxylic Acid, 2-Sulfo- is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance for your applications.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfate Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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