Qingdao Sigma Chemical (revision 18)
Old revision·08:30, 1 Dec 2024·LotTraceLuka
| Qingdao Sigma Chemical Co., Ltd. | |
|---|---|
Schematic synthesis and quality-control site. No image of this organisation's premises is available to this wiki. | |
| Legal name | Qingdao Sigma Chemical Co., Ltd. |
| Trading name | QSC |
| Other designations | Sigma Chemical, QSC Peptides |
| Identity | |
| Founded | Reported 2017 (not registry-verified) |
| Headquarters | Qingdao, Shandong, China |
| Industry | Research-compound supply |
| Shop domain | Visit QSC |
| Organisation infobox · conventions | |
Qingdao Sigma Chemical Co., Ltd. (trading as QSC; qingdaosigma.com) is a research-peptide supplier based in Qingdao, Shandong, China, described in available sources as operating from 2017 and distributing research peptides through a warehouse network, with third-party testing reported on part of its range.[1][2]
The organisation is one of twenty covered on PeptidePedia under Project:Vendor notability. Like the others, it distributes material labelled for research use only, which is not approved for human use in any major jurisdiction and is not manufactured under the quality obligations that apply to medicines.[3]
This article describes what is verifiable. Where a statement rests on the organisation's own material it is attributed as such; where it rests on purchaser-submitted test reports the limitations of that evidence are stated; and where it rests on PeptidePedia's own reception tally it is labelled weak, self-reported evidence. Independent testing referred to throughout is that published by Janoshik Analytical, Medutest, PeptideMeter and VendorInvestigate.[4]
Corporate identity and history
[edit]Available sources describe the organisation as having begun operations in 2017 in Qingdao, Shandong.[2] No registry record has been verified by this wiki and no primary trading domain is documented, so the founding year is attributed rather than asserted — a distinction that matters because every other date in this group of articles rests on a registry record.[1]
The organisation is described as operating a distributed warehouse network rather than shipping solely from China. Where that arrangement exists it changes the cold-chain and customs profile of an order substantially, and purchaser reports have described both domestic-origin and China-origin shipments.[5]
Distribution and dispatch
[edit]The organisation distributes through six regional warehouses rather than shipping every order from the manufacturing site: Netherlands (Rotterdam), serving European Union, typically 2-4 days; Germany (Hamburg), serving Germany, Austria, Switzerland, typically 2-4 days; United Kingdom (London), serving United Kingdom & Ireland, typically 2-3 days; United States (California), serving United States, typically 2-4 days; Canada (Toronto), serving Canada, typically 3-5 days; Australia (Melbourne), serving Australia & New Zealand, typically 3-5 days. Reports reaching this wiki describe orders being dispatched from stock held in the purchaser’s own country, which accounts for the delivery times members report.
Operations and documentation practice
[edit]Purchaser reports describe vialled lyophilised material with a batch certificate. Certificate content in the submitted set has been thin relative to comparators — purity and appearance, rarely a water figure and rarely a method.[5][6]
Reports on shipments from regional warehouses describe shorter transit and no customs interaction; reports on China-origin shipments describe the conventional pattern. Which route an order takes has not been predictable from the available reports.[5]
References
- ^ a b National Enterprise Credit Information Publicity System (国家企业信用信息公示系统), company registration record, retrieved 2026. Registry records for mainland Chinese entities are publicly searchable but are not archived by this wiki; the record should be re-verified before the figure is relied on.
- ^ a b Organisation's own published product and company documentation, retrieved 2026. Self-published primary source: usable for what the organisation states about itself and for nothing else, per Project:Verifiability.
- ^ Research-use-only labelling practice; see Research use only for the legal and commercial function of the phrase.
- ^ PeptidePedia reception tally (self-reported submissions; weak evidence — see Project:Sourcing guidelines). Self-selected sample; period and count stated at each point of use.
- ^ a b c Independent test reports submitted to PeptidePedia by purchasers, 2024–2026. Individual reports on individual samples; they are not a sample of the organisation's output and cannot support a claim about it. See Blind sampling.
- ^ United States Pharmacopeia, General Chapter <1503>, "Quality Attributes of Synthetic Peptide Drug Substances" (informational). USP–NF, current revision.