Are oligos desalted (salt-free)?
Oligonucleotides provided by IDT are free of added salt. No inorganic salts, such as sodium or magnesium, are used when DNA is synthesized chemically.
When used with respect to purification of an oligo, the term "desalting" refers to the removal of small organic molecules left over from the synthesis. Our desalting process does remove the majority of these organic molecules, though small amounts can still be present in a shipped oligo.