Overview

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Chelex 100 and COVID-19

Chelex 100 Resin in Pathogen Detection

Streamline your viral RNA extraction with Chelex 100 Resin
or InstaGene Matrix.

Learn More

Chelex 100 Resin is a styrene divinylbenzene copolymer containing paired iminodiacetate ions, which act as chelating groups in binding polyvalent metal ions. The carboxylic acid groups of Chelex 100 Resin classify it as a weak cation exchange resin, but it differs from other exchangers in this class by featuring uniquely high selectivities for metal ions and much higher bond strengths. The resin can be used to ultrapurify buffers and ionic reagents: it will scavenge metal contaminants without altering the concentration of nonmetal ions.

Chelex 100 chelating ion exchange resin has a stronger selectivity for copper, iron, and other heavy metal ions over monovalent cations such as sodium and potassium. Its selectivity for divalent over monovalent ions is approximately 5,000 to 1, and it has a strong attraction for transition metals, even in highly concentrated salt solutions.

Chelex 100 Resin can also capture divalent cations such as Mg2+ or Ca2+ from biological samples and inhibit the activity of metallo-nucleases. This allows Chelex 100 Resin to be used for DNA and RNA sample preparation, offering a cost-effective alternative to conventional extraction kits.

The following forms of Chelex 100 Resin are available:

  • Analytical grade Chelex 100 Resin — exhaustively sized, purified, and converted to make it suitable for accurate, reproducible analytical techniques
  • Biotechnology grade Chelex 100 Resin — the analytical grade form certified to contain fewer than 100 microorganisms per gram of resin
  • Molecular biology grade Chelex 100 Resin — certified to be endo- and exonuclease-free and contain no ligase inhibitors

Larger volumes and special packaging for industrial applications are available upon request.

More Information

Specifications

Type
Weak cation, chelating
Functional group
R-CH2N(CH2COO-)2
Matrix
Styrene divinylbenzene
Crosslinkage
1%
Approx. MW exclusion
3,500
Operating stability/pH range
4–14/0–14
Min. wet capacity (meq.ml)
0.4
Nominal density
0.65
Ionic forms
Sodium, iron*
* Iron form is glyphosate concentration.
 

Ordering

items

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1422822

500 g, cation exchange resin, sodium form, 1% crosslinkage, 50–100 dry mesh size, 300–1,180 µm wet bead size, ~3,500 MW limit

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1422832

500 g, cation exchange resin, sodium form, 1% crosslinkage, 100–200 dry mesh size, 150–300 µm wet bead size, ~3,500 MW limit

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1422842

500 g, cation exchange resin, sodium form, 1% crosslinkage, 200–400 dry mesh size, 75–150 µm wet bead size, ~3,500 MW limit

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1422825

100 g, cation exchange resin, iron form, 1% crosslinkage, 100–200 dry mesh size, 150–300 µm wet bead size, ~3,500 MW limit

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1421253

50 g, molecular biology grade cation exchange resin, sodium form, 1% cross-linkage, 200–400 dry mesh size, 75–150 µm wet bead size, ~3,500 MW limit, can be used for chromatography or molecular biology applications

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1432832
100 g, biotechnology grade cation exchange resin, sodium form, 1% crosslinkage, 100–200 dry mesh size, 150–300 µm wet bead size, ~3,500 MW limit

Documents

Number Description Options
3318
A Rapid, Simple, and Low-Cost RNA Sample Preparation Method Based on Chelex™ 100 Resin
3356
DNA Sample Preparation Using Chelex 100 Resin for Forensic and Population Genetic Analyses Publications List
LIT237
Instruction Sheet, Chelex 100 Iron Form Resin for Glyphosate Cleanup, Rev B
LIT200
Instruction Manual, Chelex 100 and Chelex 20 Chelating Ion Exchange Resin, Rev B
6908
Speciality Beads: Chelex® 100 Resin Flier, Ver A
LIT544
Instruction Manual, InstaGene™ Matrix, Rev G