20 categories

Sourcing

Supplier documentation, independent verification, red flags, logistics, payments and the regulatory picture. Maintained as documentation, not as recommendations.

140 topics6,877 posts43 solved Moderators: dr_okonkwo, t.vasquez About this category

Vendor reports 26 Independent verification 26 Red flags 24 Logistics 24 Payments 18 Regulatory 22

140 topics · page 1 of 5

Topic	Participants	Replies	Views	Activity
About the Independent verification category Sourcing › Independent verification Janoshik Analytical Medutest PeptideMeter Pinned Wiki Janoshik, Medutest, PeptideMeter and VendorInvestigate results, how to submit a sample, and how to read what comes back. This post is a community wiki: any member at trust level 3 or above can edit it, and…	+1	5	5.8k	23h
Packaging that arrived damaged: documenting it properly Sourcing › Logistics shipping customs temperature excursion cold chain Pinned Packaging that arrived damaged: documenting it properly Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…	+43	49	26k	1d
About the Regulatory category Sourcing › Regulatory research use only compounding FDA Pinned Wiki Research-use-only status, compounding rules, import restrictions, and the primary documents behind them. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…		4	49k	4mo
About the Logistics category Sourcing › Logistics shipping customs packaging Pinned Wiki Shipping, tracking, customs outcomes, packaging, and cold-chain handling in transit. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is recorded with its author…	+1	5	9.2k	12mo
A certificate whose chromatogram axes do not match its stated method Sourcing › Red flags underdosing moderation mislabelling Pinned Posting this under the heading it deserves: A certificate whose chromatogram axes do not match its stated method Everything below is what sits behind that. Structured report rather than an opinion, following…	+9	13	182	13mo
What to keep a record of at the point of payment Sourcing › Payments documentation quality payments research use only Solved Pinned What to keep a record of at the point of payment — that is the question, and I have not found it answered plainly anywhere I have looked. Structured report rather than an opinion, following the format the…		2	1.8k	16mo
About the Red flags category Sourcing › Red flags mislabelling underdosing documentation quality Pinned Wiki Closed Patterns that reliably precede a problem. Documented, dated, and free of accusation without evidence. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…		4	57k	17mo
About the Vendor reports category Sourcing › Vendor reports certificate of analysis batch & lot numbers third-party testing Pinned Wiki Structured reports on named suppliers. Batch, date, method and document, or it stays in the unverified column. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit…		4	65k	18mo
About the Payments category Sourcing › Payments payments research use only documentation quality Pinned Wiki Payment mechanics, chargeback reality, and the recurring risks. No payment facilitation of any kind here. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is…		4	3.5k	20mo
When a red flag was a misunderstanding, and the retraction Sourcing › Red flags underdosing disputed mislabelling Pinned When a red flag was a misunderstanding, and the retraction — that is the question, and I have not found it answered plainly anywhere I have looked. I would like to talk about documentation quality as a…	+34	38	8.3k	21mo
How the vendor documentation pages are maintained, and by whom Sourcing › Vendor reports certificate of analysis Janoshik Analytical batch & lot numbers documentation quality Solved How the vendor documentation pages are maintained, and by whom I have a specific reason for asking rather than idle curiosity, and the context is below. I would like to talk about documentation quality as a…		2	6k	4h
Chain of custody for a sample you posted yourself Sourcing › Independent verification PeptideMeter third-party testing Janoshik Analytical blind sampling Chain of custody for a sample you posted yourself Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…		2	7.3k	5h
A supplier who responds to a discrepancy with silence — what changed since Sourcing › Red flags mislabelling disputed documentation quality underdosing Wiki A supplier who responds to a discrepancy with silence — what changed since — setting out what I have, and where I think it stops being reliable. A logistics question, since the answers here are usually better…	+83	88	21k	6h
Documenting a supplier's response to a discrepancy Sourcing › Vendor reports third-party testing documentation quality batch & lot numbers Solved On the subject in the title: Documenting a supplier's response to a discrepancy Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers asked…	+44	49	589	8h
Coming back to: Why our vendor pages link the storefront and mark it sponsored Sourcing › Vendor reports third-party testing batch & lot numbers certificate of analysis documentation quality Why our vendor pages link the storefront and mark it sponsored I have a specific reason for asking rather than idle curiosity, and the context is below. Structured report rather than an opinion, following the…		2	22k	8h
Aggregate verification data across the directory, with caveats Sourcing › Independent verification Medutest blind sampling PeptideMeter Under review On the subject in the title: Aggregate verification data across the directory, with caveats Working notes rather than a conclusion. Structured report rather than an opinion, following the format the…	+64	74	4.6k	14h
Chain of custody for a sample you posted yourself — one year on Sourcing › Independent verification VendorInvestigate Janoshik Analytical blind sampling third-party testing Posting this under the heading it deserves: Chain of custody for a sample you posted yourself — one year on Everything below is what sits behind that. Structured report rather than an opinion, following the…	+28	32	50k	15h
Coming back to: Reconciling a supplier certificate with an independent result Sourcing › Vendor reports documentation quality certificate of analysis batch & lot numbers Posting this under the heading it deserves: Reconciling a supplier certificate with an independent result Everything below is what sits behind that. Structured report rather than an opinion, following the…	+26	30	45k	16h
Reporting a good result: why nobody bothers and why they should Sourcing › Vendor reports third-party testing Janoshik Analytical certificate of analysis batch & lot numbers Reporting a good result: why nobody bothers and why they should — setting out what I have, and where I think it stops being reliable. Structured report rather than an opinion, following the format the…		2	3.5k	17h
[2026 update] Interpreting a result that disagrees with the supplier's certificate Sourcing › Independent verification Medutest VendorInvestigate blind sampling third-party testing Solved On the subject in the title: Interpreting a result that disagrees with the supplier's certificate Working notes rather than a conclusion. Structured report rather than an opinion, following the format the…	+121	128	51k	17h
Insurance and replacement policies, compared Sourcing › Logistics temperature excursion cold chain customs shipping Solved On the subject in the title: Insurance and replacement policies, compared Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers asked for.…	+115	122	17k	17h
What a regulator's shortage notice actually authorises Sourcing › Regulatory personal import research use only EMA FDA Solved What a regulator's shortage notice actually authorises — that is the question, and I have not found it answered plainly anywhere I have looked. A logistics question, since the answers here are usually better…	+8	12	15k	17h
Transit times by route, from a logged dataset Sourcing › Logistics packaging customs shipping Solved Transit times by route, from a logged dataset Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than anywhere…	+34	38	3.6k	18h
Comparing documentation quality across the directory, tabulated Sourcing › Vendor reports third-party testing disputed Janoshik Analytical batch & lot numbers Comparing documentation quality across the directory, tabulated — setting out what I have, and where I think it stops being reliable. I would like to talk about documentation quality as a signal, separately…	+7	11	29k	19h
Submitting a sample: the process end to end Sourcing › Independent verification blind sampling PeptideMeter VendorInvestigate third-party testing On the subject in the title: Submitting a sample: the process end to end Working notes rather than a conclusion. I would like to talk about documentation quality as a signal, separately from product quality.…	+99	114	29k	21h
Coming back to: When a red flag was a misunderstanding, and the retraction Sourcing › Red flags mislabelling moderation documentation quality When a red flag was a misunderstanding, and the retraction I have a specific reason for asking rather than idle curiosity, and the context is below. A logistics question, since the answers here are usually…	+6	10	257	21h
[2026 update] Temperature indicator cards: worth asking for? Sourcing › Logistics shipping packaging customs temperature excursion Temperature indicator cards: worth asking for? I have a specific reason for asking rather than idle curiosity, and the context is below. A logistics question, since the answers here are usually better than…	+21	26	4.5k	1d
Revisiting: The report format the maintainers ask for, and why each field is there Sourcing › Vendor reports batch & lot numbers Janoshik Analytical documentation quality third-party testing Posting this under the heading it deserves: Revisiting: The report format the maintainers ask for, and why each field is there Everything below is what sits behind that. Structured report rather than an…	+100	108	57k	1d
Distinguishing a red flag from an inconvenience — a second dataset Sourcing › Red flags moderation documentation quality disputed On the subject in the title: Distinguishing a red flag from an inconvenience — a second dataset Working notes rather than a conclusion. A logistics question, since the answers here are usually better than…	+8	12	9.6k	1d
Follow-up: Patterns that reliably precede a problem, documented Sourcing › Red flags underdosing disputed documentation quality Solved On the subject in the title: Patterns that reliably precede a problem, documented Working notes rather than a conclusion. A logistics question, since the answers here are usually better than anywhere else I…		2	70	1d

Sponsored Sigma-Aldrich — certified reference materialsReference standards, analytical reagents and certified materials for method calibration. If you are validating a method, this is where the standard comes from.Reference standards →