water content

proposal — a flair for water content posts. Nothing about this affects the ranking maths, before anyone asks. Ask what the stability statement was written against —…

The title is the argument: purity is doing more work than we give it credit for. Here is the rest of it. The PDF creation date being later than the analysis date is…

purity is not what most of this community thinks it is. Two minutes of reading now saves an argument later. My first certificate had a compound name, a percentage and a…

The title is the argument: unpopular opinion: most of what gets said here about COA is guesswork. Here is the rest of it. The PDF creation date being later than the…

Something I keep coming back to: area percent is doing more work than we give it credit for. Spent four months confusing area% and mass% in every post I made here. One…

Putting this to the board: proposal — a flair for batch posts. Why the same vial can honestly produce three different numbers. Purity by area percent is relative to…

the batch rule is doing its job and people should stop complaining. Short post, long comment section, probably. Area percent is the peak area of your compound over the…

certificate of analysis is doing more work than we give it credit for. Change my mind, genuinely — I have no stake in being right about this. How to ask for a batch…

purity — 3 things I got wrong before I got it right. Not a hot take, just something I have not seen said plainly here. Net peptide content is the fraction of the powder…

three years of related substances threads, summarised so you do not have to read them, and I am aware this is a minority view on this board. UV at 214nm sees the…

Posting this as a discussion rather than a claim: the related substances thing finally clicked for me and I want to write it down. The document I was worried about…

16th independent test on WXT — 99.3% on a claimed 98.5%, and the trend is the interesting part. I will put the method line and the batch identifier up front because…

reading certificate of analysis threads from 2024 and half of it aged badly, and I am aware this is a minority view on this board. UV at 214nm sees the peptide bond and…

The title is the whole question — do related substances actually matter or is it forum lore at this point — but here is why I am asking. The PDF creation date being…

the purity advice in here is 3 years out of date. It is the sort of thing everyone half-believes and nobody writes down. Hard numbers: 3 years. Anything softer than…

Slightly embarrassed to be asking this, but: help me understand COA, I have read the wiki twice. My first certificate had a compound name, a percentage and a logo. I…

the related substances advice in here is 2 years out of date — a position I have arrived at slowly and would like tested. To save the first four comments: 2 years. Net…

vendor COA says 99.2%, my Janoshik came back 97.4%. who is wrong, and before anyone asks: same batch throughout, single submission, no cherry-picking between services.…

Slightly embarrassed to be asking this, but: certificate of analysis — what am I missing here. Spent four months confusing area% and mass% in every post I made here.…

6th independent test on HJ — 99.1% on a claimed 99.0%, and the trend is the interesting part. One vial, one service, one member paying, which is the only kind of result…

COA — 5 things I got wrong before I got it right — a position I have arrived at slowly and would like tested. LC-MS gives you identity; UV purity gives you a relative…

The title is the argument: related substances — 9 things I got wrong before I got it right. Here is the rest of it. The PDF creation date being later than the analysis…

Genuine question, and the title is the question: how much of what we believe about COA actually comes from area percent threads. My first certificate had a compound…

batch is not what most of this community thinks it is. It comes up every few weeks and the answer has not changed. The document I was worried about turned out to be a…