Description

Dowex Monosphere 550 A, Cl(-)-Form, 20-50 Mesh is a premium-grade, strongly basic anion exchange resin supplied in the chloride form. This product is engineered for superior performance in demanding industrial separation and purification processes, offering high capacity, excellent mechanical stability, and uniform particle size distribution. It is an essential component for water treatment, chemical processing, and pharmaceutical applications where reliable ion exchange is critical. The CAS number for this compound is 127361-68-6.

Application

• Demineralization & Deionization: Key component in mixed-bed and separate-bed systems for producing high-purity water for power generation, electronics, and laboratory use.
• Chemical Purification: Used in the purification and recovery of acids, metals, and organic compounds in chemical synthesis and hydrometallurgy.
• Sugar & Sweetener Processing: Employed for decolorization and demineralization in the refining of sugar, corn syrup, and other sweeteners.
• Pharmaceutical Intermediates: Facilitates the separation and purification of active pharmaceutical ingredients (APIs) and intermediates.
• Condensate Polishing: Removes ionic impurities from steam condensate in industrial boilers to prevent corrosion and scaling.
• Wastewater Treatment: Effective for the removal of nitrate, sulfate, and other anions from industrial effluents.

Basic Information

Product Name	Dowex Monosphere 550 A, Cl(-)-Form, 20-50 Mesh
CAS No.	127361-68-6
Molecular Formula	(C8H8·C4H6O2·C2H8N)x
Molecular Weight	N/A (Cross-linked polymer)
Synonyms	Dowex 1; Dowex SBR; Strongly Basic Anion Exchange Resin Type I; Quaternary Ammonium Polystyrene Resin; Amberlite IRA-400; Anion Exchange Resin (Chloride Form); Monosphere 550A (Cl); Gel Type Strong Base Anion Exchanger
EINECS	Contact for details

Quality Control

Every batch of Dowex Monosphere 550 A resin is manufactured under strict quality management systems. Our products undergo rigorous quality testing to ensure compliance with industry standards for critical parameters such as total exchange capacity, moisture content, bead integrity, and particle size distribution. Certificates of Analysis (COA) detailing lot-specific results 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, well-ventilated area at ambient temperature (15-25°C). The resin is supplied moist; do not allow it to dry out, as this may cause irreversible damage to the bead structure. Keep away from strong oxidizing agents and incompatible materials. The original container is the recommended storage vessel.

Specification

Item	Specification
Ionic Form	Chloride (Cl-)
Matrix	Polystyrene-DVB, Gel Type
Functional Group	Quaternary Ammonium (Type I)
Particle Size (Mesh)	20 - 50
Total Exchange Capacity	≥ 1.0 eq/L (min)
Moisture Holding Capacity	50 - 60 %
Uniformity Coefficient	≤ 1.2
Reversible Swelling (Cl- → OH-)	~20%

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