Large-scale Chinese manufacturer specializing in custom peptide synthesis for international research suppliers. Serves as a primary source for many western-facing vendors.
QingDao Sigma Chemical is based in Qingdao, China, specialising in Custom Synthesis, Research Peptides, Bulk APIs, minimum order 10g per peptide.
No manufacturing licence is recorded for QingDao Sigma Chemical in our data. That is an absence of information rather than evidence of a problem, but it means nothing here has been verified against a regulator's register.
48 independent third-party assays in our records name QingDao Sigma Chemical as the manufacturer, covering 43 compounds, with a median measured purity of 99.4%.
Manufacturer entries describe who produces a compound, not who sells it to you. For purchasing, the vendor directory records storefront reachability, assay history and FDA warning-letter history separately.
Compounds assayed from this manufacturer: Tirzepatide 50 Mg, Tirzepatide 30 Mg, Semaglutide 5 Mg, Tirzepatide 10mg, Tirzepatide 30mg, Bpc-157, Cagrilintide 5 Mg, Semaglutide, Retatrutide 20 Mg, Retatrutide 15 Mg, Semaglutide 10mg.
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