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 [PSA] certificate of analysis is not what most of this community thinks it is — 23 comments in the full submission. View in context.
337
c/coa·submitted 2 months ago by u/first_hundred

[PSA] certificate of analysis is not what most of this community thinks it is

COAbranch of 8 comments

certificate of analysis 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 logo. I thought that was normal. It is not, and now I know what to ask for. How to ask for a batch record without it turning into a…

Read the full submission and all 23 comments →

This branch

8 comments, started 2 months ago
u/coa_janitorMOD52 points·2 months ago

Reminder: a question about a document is not an accusation about a supplier, and posts that blur the two get retitled.

replysharereportpermalink
u/meera_sandvik73 points·2 months ago

Did you ask for the batch-specific document, or is this the catalogue one?

replysharereportpermalink
u/freya_baptista19 points·2 months ago

Batch number and date of analysis, are both on there?

replysharereportpermalink
[deleted]13 points·2 months ago

[deleted]

replysharereportpermalink
u/aleksi_eriksen19 points·2 months ago

Pushing back a little: a missing field is usually presentation, not concealment. Ask for the full document before drawing conclusions.

replysharereportpermalink
u/neha_erdogan28 points·2 months ago

What does the method line actually say? Not the technique — the column and the gradient.

replysharereportpermalink
u/cato_achebe14 points·2 months ago

Disagree that a lower number is automatically worse. A conservative claim that survives testing is worth more than an optimistic one that does not.

replysharereportpermalink
u/low_appetite_lisa23 points·2 months ago

Careful — "the metadata looks odd" is a reason to ask a question, not a conclusion. Re-issues are ordinary.

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 →