Description

5-Sulphoisophthalic Acid, Ammonium Sodium Salt is a high-purity, water-soluble organic salt derived from isophthalic acid, serving as a key functional intermediate in advanced polymer synthesis. Its primary value lies in introducing sulfonate groups into polymer chains, imparting crucial properties like hydrophilicity, dyeability, and antistatic characteristics. This compound is essential for manufacturers in the specialty polymer, textile fiber, and coating industries seeking to enhance material performance.

Application

• Polymer Modification: As a comonomer for producing sulfonated polyesters and polyamides, improving dye uptake and moisture management in fibers.
• Water-Soluble Resins: A key building block for resins used in water-based coatings, inks, and adhesives.
• Dye & Pigment Intermediates: Used in the synthesis of anionic dyes and high-performance organic pigments.
• Ion-Exchange Materials: A precursor for manufacturing membranes and resins with ion-selective properties.
• Detergent & Dispersant Formulations: Acts as a hydrotrope and sequestering agent in industrial cleaning and processing aids.
• Pharmaceutical Intermediates: Employed in the synthesis of certain active pharmaceutical ingredients (APIs) requiring sulfonate functionality.

Basic Information

Product Name	5-Sulphoisophthalic Acid, Ammonium Sodium Salt
CAS No.	71872-95-2
Molecular Formula	C8H9NO8S • xNa (Contact for exact stoichiometry)
Molecular Weight	Contact for details
Synonyms	5-Sulfoisophthalic Acid Monoammonium Monosodium Salt; Ammonium Sodium 5-Sulfoisophthalate; 5-SIPA Salt; SIPAS; 5-Sulfobenzene-1,3-dicarboxylic Acid Ammonium Sodium Salt; 1,3-Benzenedicarboxylic acid, 5-sulfo-, ammonium sodium salt
EINECS	Contact for details

Quality Control

Our 5-Sulphoisophthalic Acid, Ammonium Sodium Salt is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance. Certificates of Analysis (COA) detailing specifications such as assay, sulfonate content, and impurity profiles are available upon request to support your quality assurance protocols.

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); ensure containers are sealed immediately after use to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Sulfonate Content	Contact for details
Loss on Drying	≤ 5.0%
Residue on Ignition (Sulfated Ash)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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