Sephadex G-50 is a well-established size exclusion chromatography resin for desalting and buffer exchange of biomolecules > 30 000 molecular weight, and with a spin protocol can be used for DNA and oligo purification of molecules greater than 20 bases in length.

Alternatively, Sephadex G-100 DNA Grade can be used. Sephadex G-100 DNA Grade has an exclusion limit of 25bp ds DNA.

All these Sephadex types are therefore highly suitable for the purification of oligonucleotides or small DNA fragments following synthesis or in labeling applications.

Sephadex G-50 DNA Grade, and Sephadex G-100 are also sold separately.