Phosphoramidites are modified nucleosides used in the chemical synthesis of oligonucleotides. Synthetic oligonucleotides often contain low levels of multiple classes of impurities which can ultimately influence their efficacy and toxicity.
USP has developed DNA phosphoramidites reference standards that can help manufacturers identify and control impurity profiles during oligonucleotide synthesis using various analytical techniques, including HPLC, 31P NMR, GC, and LC-MS. Ultimately these standards may help yield better control over manufacturing process.
The DNA phosphoramidites reference standards can support the quality assessment of raw materials throughout the life cycle from oligonucleotide products development to lot release.