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c/vendorvetting·posted 1 year ago by u/liv_dumitru

[PSA] order records are not what most of this community thinks it is

PSA Receipts ×8 Slow Clap ×3 Cold Box ×1

order records are not what most of this community thinks it is, written plainly and without the jargon that usually swallows this topic.

Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.

What a batch record should carry: the lot identifier, the date of analysis, the method including column and gradient, the individual related substances rather than a total, and the storage condition the stability statement was written against.

A certificate with a purity figure and no method line is not falsifiable. You cannot reproduce it, you cannot check it, and it tells you nothing about how the number was produced.

That is everything I have. The rest is opinion and I have tried to keep it out.

3,955 up / 1,150 down77% upvoted38 commentsid 2oenfc28 May 2025

38 comments

3 in this archive, depth 2

best — the order this archive was captured in

u/nz_unfunded512 points·1 year ago

Inter-lab variance on this assay runs a point or two either way. Two services disagreeing by that much is agreement, not a discrepancy, and treating it otherwise starts pointless arguments.

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u/kasper_cabrera247 points·1 year ago

Independent testing is worth more than a supplied certificate for one structural reason: the chain of custody. A member who buys, ships and pays is testing the same thing you would receive.

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u/ruben_brandt143 points·1 year ago

lead time quoted at checkout is the number to hold them to

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About c/vendorvetting

The community due-diligence desk. Vendor experiences, independent third-party test results, shipping and reship records, and the boring paperwork that separates a supplier from a story. Every substantive claim is expected to carry a receipt: an order id, a dated screenshot, or a test report from Janoshik, Medutest, PeptideMeter or VendorInvestigate.

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Janoshik Analytical

Independent HPLC and mass spec. The number you get is the number they found.

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Custom peptides and amino acids direct from the manufacturer since 1998. ISO 9001 / cGMP. Batch COA every order.

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