Description

Ionac SR-4 Ion Exchange Resin for Selective Absorption is a high-performance, strongly acidic cation exchange resin designed for targeted ion separation and purification processes. This specialized resin is critical for applications requiring the selective removal of specific cations from complex aqueous or organic streams, ensuring product purity and process efficiency. It is essential for industries such as hydrometallurgy, chemical synthesis, wastewater treatment, and the production of high-purity process streams where precise ion control is paramount.

Application

• Hydrometallurgical Recovery: Selective extraction and purification of valuable metals like copper, nickel, or rare earth elements from leach solutions.
• Catalyst & Chemical Synthesis: Used as a solid acid catalyst in organic synthesis or for the purification of intermediates by removing metallic impurities.
• High-Purity Water Streams: Polishing step in ultrapure water (UPW) systems for final cation removal to achieve parts-per-billion (ppb) levels.
• Wastewater Treatment: Targeted removal of heavy metal cations (e.g., lead, cadmium, zinc) from industrial effluent to meet environmental discharge standards.
• Sugar & Sweetener Processing: Decolorization and demineralization by removing cationic impurities that affect color and taste.
• Pharmaceutical Intermediates: Purification steps to isolate or remove specific ionic species during active pharmaceutical ingredient (API) manufacturing.
• Nuclear Industry: Separation and concentration of specific radioactive isotopes from process streams.
• Analytical Chemistry: Sample preparation and pre-concentration of analytes in chromatographic and spectroscopic methods.

Basic Information

Product Name	Ionac SR-4 Ion Exchange Resin for Selective Absorption
CAS No.	71010-99-6
Molecular Formula	(C8H8)n · (C3H6O3S)x (Typical for sulfonated polystyrene-divinylbenzene copolymer)
Molecular Weight	N/A (Cross-linked polymer)
Synonyms	Strong Acid Cation Exchange Resin; Sulfonated Polystyrene Resin; Cation Exchanger SR-4; Ionac SR-4; SAC Resin; Polystyrene Sulfonic Acid Resin; Gel Type Cation Exchange Resin; Hydrogen Form Cation Resin; 71010-99-6; Styrene-DVB Sulfonic Acid Resin
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure batch-to-batch consistency and performance reliability for industrial applications. Each lot is evaluated against key parameters such as total exchange capacity, moisture holding capacity, particle size distribution, and uniformity coefficient. Certificates of Analysis (COA) are available upon request, detailing the specific characteristics of your shipment. Our manufacturing adheres to strict quality management protocols to meet the demands of critical separation processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). The resin should be kept in its original shipping container or in a suitable vessel to prevent contamination and moisture absorption. Avoid freezing and prolonged exposure to temperatures above 40°C. Keep away from strong oxidizing agents.

Specification

Item	Specification
Matrix	Polystyrene cross-linked with divinylbenzene
Functional Group	Sulfonic acid (-SO3H)
Ionic Form (as shipped)	Hydrogen (H+) / Sodium (Na+)
Total Exchange Capacity	≥ 1.8 eq/L (H+ form)
Moisture Holding Capacity	45 - 55%
Particle Size Range	0.3 - 1.2 mm
Uniformity Coefficient	≤ 1.7
Maximum Operating Temperature	120°C (H+ form)
pH Range	0 - 14
Appearance	Spherical beads, amber to dark brown

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