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Single comment threadYou are looking at one branch of the water content question that gets asked weekly, answered properly — 28 comments in the full submission. View in context.
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c/coa·submitted 1 months ago by u/coa_janitor

the water content question that gets asked weekly, answered properly

Labbranch of 4 comments

Quick one. Canada here. related substances works very differently where I live than in the threads that dominate the front page, and I keep seeing people confidently given advice that simply does not apply outside the US. Specifics: the route I used took 20 weeks and cost roughly what I expected. The admin was worse…

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4 comments, started 1 months ago
u/foam_head_fred95 points·1 months ago
i have this exact spreadsheet
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u/priya_palacios56 points·1 months ago

post the whole document, not the headline number

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u/coa_janitorOPmod · c/coa43 points·1 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/freya_baptista14 points·1 months ago

Slight fix: the number was 97.2, not 97.4. Decimal point, but a fairly consequential one.

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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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