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c/coa·submitted 7 months ago by u/sofia_ferreira

anyone else notice water content kicking in around week 39

Explainerbranch of 7 comments

I have had 20 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 24 days on nominally the same lane, which matters more in summer than in February. The independent number came back 98.4% against a claimed…

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7 comments, started 7 months ago
u/liv_nkemelu108 points·7 months ago

The COA I was holding said 96.8% area and I thought it was trash. Turns out the method was solid and the impurity profile was clean.

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u/sofia_ferreiraOP69 points·7 months ago

PDF metadata is checkable in fifteen seconds

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u/sofia_ferreiraOP41 points·7 months ago

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

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u/anya_correia9 points·7 months ago

the batch number or it did not happen

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u/ismael_eriksen21 points·7 months ago·edited

What were the related substances listed individually?

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u/katrin_girard7 points·7 months ago·edited

the counterion is part of the mass you paid for

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u/blunt_coldbox2918 points·7 months ago

post the whole document, not the headline number

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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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