PDRN — polydeoxyribonucleotide — has moved from a niche ingredient to a widely requested cosmetic raw material. It is a polymer derived from salmon DNA, supplied as a white powder, and formulators increasingly evaluate it for skin-positioned product lines. If you are sourcing PDRN powder for the first time, the buying criteria differ from standard single-molecule actives, and this guide walks through what to check.
What Exactly Is PDRN Powder?
PDRN is a multi-component polymer rather than a single well-defined molecule. It is produced by purification of DNA extracted from salmon, and in the industry the designation CAS 100403-24-5 is conventionally applied to this material. Because it is a polymer with a distribution of chain lengths, quality control depends heavily on consistent manufacturing, reproducible purity testing and clear documentation rather than on a single molecular fingerprint.
Specifications commonly quoted for cosmetic-grade PDRN powder include an HPLC purity level (for example, 98% by HPLC) and a white powder appearance. These are the values your incoming quality control should verify against the certificate of analysis.
What to Check When Sourcing PDRN
- Origin and derivation. Ask the supplier to state the source material (salmon-derived DNA is the standard for cosmetic PDRN) and the purification approach in general terms.
- Purity and grade. Confirm the HPLC purity and the cosmetic grade in writing. Grade claims should match the specification sheet, not only the marketing copy.
- COA documentation. Request the batch certificate of analysis and verify that batch number, appearance, purity and methods are all present.
- Appearance. White powder is the standard expectation for PDRN in cosmetic grade; flag any discolouration immediately.
- Third-party testing. Because PDRN is a polymer, independent verification of molecular weight range or purity adds confidence. Reputable suppliers can share third-party results or arrange testing on request.
Formulator Checklist Before Scale-Up
Before moving from sample to production batch, confirm that the supplier can hold consistent quality across batches: same grade, same purity specification, same appearance and same documentation format. Request stability-relevant information such as storage conditions (a cool, dry place away from light) and stated shelf life, and check packaging integrity on arrival.
If you are new to the category, our article on how to verify a peptide raw material supplier provides a general checklist that applies to PDRN as well. For formulation-level questions, the principles in our guide to copper peptides in skincare also illustrate how actives are validated in a formula before commercial launch.
Requesting PDRN Samples and Quotes
Review the full specification — appearance, purity, packaging and shelf life — on our PDRN (polydeoxyribonucleotide) product page. To receive a quotation, COA documentation and sample terms, submit your requirements through the inquiry form and our team will respond with the batch documentation.