Vendor Intelligence Report: Qingdao Sigma Chemical QSC

Published 13 Jun 2026. 26-page investigative report on who is behind Qingdao Sigma Chemical QSC: corporate records, ownership, affiliate networks, and the vendor's lab-testing record. The first 4 pages are free to read on this page.

Across 30 Finnrick lab tests, Qingdao Sigma Chemical QSC posts a 70% overall pass rate, with Tirzepatide testing meaningfully stronger than Retatrutide. The full report maps the Chinese registry…