GLPHubglpresearchhub.com
Read-only archive. GLP Research Hub is a static community record — nothing here is for sale, no account is needed, and no vote you cast is counted. Why?
Single comment threadYou are looking at one branch of [Discussion] the related substances advice in here is 15 years out of date — 52 comments in the full submission. View in context.
7.4k
c/coa·submitted 2 years ago by u/santiago_szabo

[Discussion] the related substances advice in here is 15 years out of date

Discussionbranch of 6 comments

Genuinely asking, not being difficult. Everyone in c/scamalerts repeats that purity is important. I believe it, but I have never seen anyone show why, and when I search I get 9 threads of people agreeing with each other. Is there a paper? Is there a measurement? Or is this one of those things that is true because it…

Read the full submission and all 52 comments →

This branch

6 comments, started 2 years ago
u/laila_wojcik60 points·2 years ago

area% is not mass%, and here is exactly why it matters

replysharereportpermalink
u/fatima_wojcik38 points·2 years ago

Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.

replysharereportpermalink
u/priya_palacios17 points·2 years ago

Did they give you the chromatogram or just the summary line?

replysharereportpermalink
u/janek_ferrari9 points·2 years ago

axis labels included, always

replysharereportpermalink
u/aurel_boateng2 points·2 years ago

Cosigning. The batch number is load-bearing information.

replysharereportpermalink
u/ahmed_rasmussen17 points·2 years ago

the batch number or it did not happen

replysharereportpermalink

← back to the whole thread

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.

71kmembers
130submissions
Aug 2023created
submissions / month, last year
Sponsored

PeptideMeter Analytics

Independent testing plus vendor-level trend data. Community-funded, unaffiliated.

peptidemeter.com
More in c/coa
c/coa rules
  1. Post the full document. Cropped COAs that hide the batch number or date get removed.
  2. Redact your own name and order id, not the vendor's batch details.
  3. No "is this good?" without saying what the compound and claimed purity are.
  4. Independent community. Nobody here sells anything, and anyone who tries is banned.
  5. Not medical advice. Describe what you did; never prescribe to a stranger.
  6. Claims need evidence. Batch numbers, dated screenshots, independent test reports, or a citation.
  7. No referral links, discount codes or affiliate URLs. Permanent ban, no appeal.
  8. No contact handles, wallet addresses or tracking numbers — they identify people.
  9. Be recognisably decent. Disagree hard, insult nobody.
Full rules and how they are enforced →
Moderators
u/coa_janitoru/purity_pedantu/coa_collectoru/certified_referenceu/first_hundred
Volunteers. Unpaid, unaffiliated, and reachable through modmail only.
Before you read on

Several compounds discussed on GLP Research Hub are sold for research use only and are not approved for human use anywhere. Nothing here is medical advice and none of it is written by your clinician. If a post reads like an instruction, treat it as a description of what one stranger did.

Full disclaimer →