Yang Ruosong
Head of Technical Content · Onerchemical
Yang Ruosong leads technical content at Onerchemical, writing on cosmetic preservation chemistry, challenge-test methodology, and preservative regulation across EU 1223/2009, US FDA, China NMPA, and ASEAN markets.
Topics covered
- Preservative selection by product form, pH, and distribution channel
- Challenge testing — ISO 11930, USP 51 methodology and failure diagnosis
- Regulatory compliance across major cosmetic markets
- Preservative-booster interactions and chelator-boosted systems
Primary profile
Full biographical profile is maintained on the main site: onerchem.com/yang-ruosong.