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c/coa·submitted 2 months ago by u/ismael_eriksen

reading area percent threads from 2024 and half of it aged badly

Explainerbranch of 9 comments

I have had 14 orders now and I keep a table, so here is the honest summary rather than a vibe. Material has been consistent. Communication has not. Shipping has varied by about 10 days on nominally the same lane, which matters more in summer than in February. The independent number came back 99.0% against a claimed…

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9 comments, started 2 months ago
u/cato_achebe63 points·2 months ago
genuine question, not being difficult: how do you know
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u/emeka_chowdhury91 points·2 months ago

That is net peptide content, not purity. Different number, different meaning.

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u/ismael_eriksenOP50 points·2 months ago

redact your own name, not the vendor's batch details

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u/teodor_lokken13 points·2 months ago

the batch number or it did not happen

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u/teodor_lokken46 points·2 months ago

What were the related substances listed individually?

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u/receptor_bias_rick29 points·2 months ago

This is the correct framing. The COA structure matters as much as the number.

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About c/coa

How to read a certificate of analysis and what it does and does not tell you. Area% versus mass%, identity versus quantity, water content, related substances, acetate counterions, and the difference between a vendor-supplied COA and an independent test on the vial you actually received.

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