Description

5-Sulfoisophthalic Acid Monolithium Salt is a high-purity, water-soluble lithium salt derivative of sulfoisophthalic acid, serving as a key functional monomer and anionic surfactant. Its primary value lies in its ability to impart permanent negative charge, hydrophilicity, and excellent dispersing properties to polymers and formulations. This compound is essential for manufacturers in the polymer, textile, and specialty chemical industries seeking to enhance product performance through ionic modification.

Application

• Polymer Modification: As a critical monomer for synthesizing water-soluble or dispersible polyesters, polyamides, and polyurethanes, improving dyeability and antistatic properties.
• Dispersants & Surfactants: Used in the formulation of high-performance dispersants for pigments, dyes, and ceramic powders in aqueous systems.
• Textile Auxiliaries: Key component in fiber spin finishes and textile processing chemicals to ensure smooth processing and enhanced fiber quality.
• Coating & Ink Resins: Incorporated into resin backbones for water-based coatings and inks to improve stability, adhesion, and flow characteristics.
• Ion-Exchange Materials: Serves as a precursor or functional group in the manufacture of specialty ion-exchange resins and membranes.
• Pharmaceutical Intermediates: Utilized in the synthesis of certain anionic drug compounds requiring sulfonate functionality for enhanced solubility.

Basic Information

Product Name	5-Sulfoisophthalic Acid Monolithium Salt
CAS No.	46728-75-0
Molecular Formula	C8H5LiO7S
Molecular Weight	252.09 g/mol
Synonyms	5-Sulfoisophthalic Acid Lithium Salt; Monolithium 5-Sulfoisophthalate; Lithium 5-Sulfobenzene-1,3-dicarboxylate; 5-SIPA Li Salt; 5-Sulfo-1,3-benzenedicarboxylic Acid Monolithium Salt; SIP Li; 5-Sulfoisophthalic Acid, Lithium Derivative
EINECS	Contact for details

Quality Control

Our 5-Sulfoisophthalic Acid Monolithium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) documenting assay, impurity profile, and physical parameters is provided with every shipment to guarantee traceability and compliance with your quality 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after each use 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 to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfate Ash	≤ 0.5%
pH (5% aqueous solution)	3.0 - 5.0
Heavy Metals (as Pb)	≤ 20 ppm

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