Description

Chelex 100 is a high-purity, analytical-grade chelating resin widely used for the selective removal of transition and heavy metal ions from aqueous solutions. Its core value lies in its exceptional binding capacity and specificity, which is critical for applications requiring ultra-low metal contamination. This product is essential for researchers and industrial professionals in molecular biology, biochemistry, pharmaceutical manufacturing, and high-purity water treatment who demand reliable metal ion control.

Application

• Molecular Biology & Biochemistry: Removal of metal ions that can inhibit enzymatic reactions (e.g., PCR, restriction digests) and purification of metal-sensitive proteins and nucleic acids.
• Pharmaceutical & Biopharmaceutical Processing: Purification of active pharmaceutical ingredients (APIs) and buffers by scavenging catalytic metal impurities to ensure product stability and safety.
• Analytical Chemistry: Sample preparation for trace metal analysis (AAS, ICP-MS) to prevent matrix interference and improve analytical accuracy.
• High-Purity Water Systems: Polishing step in laboratory and industrial ultrapure water production to achieve parts-per-billion (ppb) levels of metal contaminants.
• Food & Beverage Industry: Stabilization of products by chelating pro-oxidant metals, thereby extending shelf life and preserving flavor and color.
• Electronics Manufacturing: Production of high-purity chemicals and etchants where even trace metals can compromise semiconductor yield and performance.

Basic Information

Product Name	Chelex 100
CAS No.	147171-95-7
Molecular Formula	(C9H9NO6S2)n
Molecular Weight	Monomer: 275.30 g/mol (as iminodiacetic acid functional group)
Synonyms	Chelex® 100 Resin; Chelating Resin Chelex 100; Iminodiacetic Acid Chelating Resin; IDA-Chelating Resin; Chelating Ion Exchange Resin; Styrene-DVB Chelating Resin; Metal Chelate Resin; Bio-Rad Chelex 100
EINECS	Contact for details

Quality Control

Every batch of Chelex 100 is manufactured and tested under a strict quality management system. We ensure the product meets high-purity standards suitable for sensitive analytical and life science applications. Certificates of Analysis (COA) detailing metal binding capacity, particle size distribution, and purity are provided to guarantee consistency and performance for your critical processes.

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). Keep away from strong oxidizing agents. The resin is supplied in a liquid suspension; do not allow to dry out.

Specification

Item	Specification
Appearance	White to off-white beads
Functional Group	Iminodiacetic acid
Matrix	Styrene-Divinylbenzene copolymer
Ionic Form (as supplied)	Sodium form (Na+)
Total Capacity	≥ 0.4 meq/mL
Particle Size Range	75-150 μm (100-200 mesh, wet)
Maximum Operating Temperature	120°C
pH Range (Stable)	1 - 14

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