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c/researchpeptides·submitted 8 months ago by u/formulary_fighter

[Lab] TFC BPC — Janoshik came back 98.4% against a claimed 98.0%

Labbranch of 6 comments

TFC BPC — Janoshik came back 98.4% against a claimed 98.0%. That is the headline. The document, the batch and the service are below so you can argue with the method rather than with me. Figures up front so nobody has to dig: 98.4% and 98.0%. Bought small on anything without a testing history here. That rule has never…

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6 comments, started 8 months ago
u/heart_rate_bump5 points·8 months ago

The three questions to ask before ordering anything from the long tail of a catalogue.

What exactly is it — catalogue number or sequence, not a common name, because several common names map to more than one molecule. How was identity established — mass against theoretical, ideally, rather than a bare purity figure. What are the storage conditions, stated specifically, with a state and a duration attached.

Then two commercial questions that save time: is this a stocked line or made to order, and what is the lead time in writing. All five are one email, and the shape of the reply tells you a great deal before any material moves.

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[deleted]4 points·8 months ago

[deleted]

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u/yannick_barros3 points·8 months ago

Yes. Naming conventions in this corner are loose enough that the same word covers several different molecules.

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u/formulary_fighterOPappeals1 point·8 months ago

Net peptide content on the certificate?

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u/fabio_lehtinen1 point·8 months ago

Net peptide content on the certificate?

Agreed — and the naming problem is worse than most people here realise.

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u/salma_almeida4 points·8 months ago

purity methods differ between compound classes

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