Sephadex™ G-50 M DNA Grade chromatography resin for purification of DNA fragments up to 20 bases in length from small molecules such as salts by size exclusion. DNA fragments above 20 bases will be excluded from the resin and will pass through without retention compared to smaller molecules. The media is provided in bulk (dry) format to allow researchers to prepare their own columns for purifying nucleic acids. The product is tested to ensure reproducibility and high recovery of DNA (> 90%).