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

[Meta] the certificate of analysis rule is doing its job and people should stop complaining

Labbranch of 5 comments

Something I noticed reading old threads that I have not seen said out loud. The advice on related substances in this community changed substantially around the start of last year, and nobody went back and updated the older posts. So depending on which thread the search engine hands you, you get two contradictory…

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5 comments, started 7 months ago
u/tidy_vialdrawer_pls306 points·7 months ago

Mechanistically the bit that matters is water content. It explains most of the early profile and a decent chunk of the outcome.

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[deleted]217 points·7 months ago

[deleted]

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u/rohan_steiner86 points·7 months ago

You have restated the marketing copy. What is the actual substance here.

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u/janek_ferrariOP0 points·7 months ago

the method line is doing real work, not just window dressing

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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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