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The report format the maintainers ask for, and why each field is there — what changed since

Sourcing › Vendor reports third-party testing disputed Janoshik Analytical

d.bramleyTL3Regular11 Dec 2024#1

The report format the maintainers ask for, and why each field is there — what changed since Writing it up because I had to work it out twice and would rather nobody else did.

Structured report rather than an opinion, following the format the maintainers asked for.

Compound: tirzepatide
Independent testing: Janoshik
Method as reported: reversed-phase HPLC, 214 nm
Result: 96.9% area
Certificate figure for the same lot: 99.1%

I am not drawing a conclusion about the supplier from one lot and I would ask that nobody else does either. I am adding a data point to a record.

42 likes 20mo

m.yildizTL223 Dec 2024#2

Photograph the vial and the label before opening. It costs ten seconds and it is what turns a report into something checkable.

That matches what I was told, which is not the same as knowing it.

10 likes 19mo

r.torrenceTL2Member1 Jan 2025 · edited#3

Worth separating two things that the opening post runs together.

Where you have no independent result, a documentation report is still worth filing: what the certificate contained, what it omitted, and how fast a request was answered.

1 like 19mo

c.kuuselaTL28 Jan 2025#4

r.torrence, post #3: Worth separating two things that the opening post runs together. Where you have no independent result, a documentation report is still worth filing: what the certificate contained, what it omitted, and how fast a request was answered. Go to post

Comparing your result to somebody else's on a different lot is not a comparison of suppliers. Lot is the unit and it should be in every report.

0 likes in reply to #3 19mo

IbrahimoviTL2Member15 Jan 2025#5

Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.

16 likes 18mo

z.nakamuraTL222 Jan 2025#6

Marking my place. If it changes for me I will come back and say so.

6 likes 18mo

cannula_notesTL2Member29 Jan 2025#7

On post #5 — agreed on the reasoning, with one qualification.

The format we ask for is compound, lot, testing service, method as reported, result, and the certificate figure for the same lot. A report missing any of those goes to the discussion rather than the record.

A weak preference rather than a position.

0 likes 18mo

e.tammTL24 Feb 2025#8

z.nakamura, post #6: Marking my place. If it changes for me I will come back and say so. Go to post

Picking up post #5: that is the part I would want checked first.

Report the certificate figure alongside the independent one. The comparison is the point and it is the part most often omitted.

31 likes in reply to #6 18mo

s.grigorescuTL210 Feb 2025#9

Collapsed as off-topic by two members at trust level 3 or above

I had written a reply contradicting post #5 and deleted it. Here is what survived.

A difference inside method repeatability is not a disagreement. Saying so in your own report prevents somebody else reading it as one.

sa.rasmussenTL216 Feb 2025#10

Confirming post #8 from a second method, which matters more than confirming it from a second person.

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

3 likes 17mo

b.aaltoTL221 Feb 2025#11

The maintainers will ask for missing fields rather than rejecting a report. Filling them in afterwards is normal and nobody minds.

I have said this before in a thread nobody could find, so it is worth repeating.

13 likes 17mo

k.fonsecaTL227 Feb 2025#12

Agreed, and I will stop repeating the version of this I had been repeating.

26 likes 17mo

k.vanheckeTL24 Mar 2025#13

d.bramley, post #1: The report format the maintainers ask for, and why each field is there — what changed since Writing it up because I had to work it out twice and would rather nobody else did. Structured report rather than an opinion, following the format the maintainers asked for. Compound: tirzepatide Independent testing: Janoshik Method as reported:… Go to post

Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence.

0 likes in reply to #1 17mo

v.baptistaTL210 Mar 2025#14

Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are different. Both matter for different reasons.

4 likes 17mo

bench_notesTL4 Moderator15 Mar 2025#15

Narrowing post #14, because the general version has more than one answer.

Date the report: when the analysis was done matters. Material can degrade in storage. A report from two years ago is still useful but is not evidence about the current state of the same supplier's stock.

A partial answer, offered because a partial answer beats none.

8 likes 16mo

s.cabreraTL220 Mar 2025#16

Everything in post #13 holds. The case it does not cover is the one I have.

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

Posted with less confidence than the sentence structure implies.

19 likes 16mo

PharmNotes_WhitfieldTL4Pharmacist25 Mar 2025 · edited#17

Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.

0 likes in reply to #3 16mo

s.mbekiTL230 Mar 2025#18

cannula_notes, post #7: On post #5 — agreed on the reasoning, with one qualification. The format we ask for is compound, lot, testing service, method as reported, result, and the certificate figure for the same lot. A report missing any of those goes to the discussion rather than the record. A weak preference rather than a position. Go to post

I would want to see it done twice before believing it once.

2 likes in reply to #7 16mo

s.hartmannTL24 Apr 2025#19

Confirming post #18 from a second method, which matters more than confirming it from a second person.

Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence.

5 likes 16mo

KForsbergTL2Member9 Apr 2025#20

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

13 likes 16mo

c.grimaldiTL214 Apr 2025#21

s.grigorescu, post #9: I had written a reply contradicting post #5 and deleted it. Here is what survived. A difference inside method repeatability is not a disagreement. Saying so in your own report prevents somebody else reading it as one. Go to post

Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence.

1 like in reply to #9 15mo

f.villalobosTL219 Apr 2025 · edited#22

Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.

Not disagreeing with anyone above, just adding the bit I keep having to look up.

0 likes 15mo

j.fonsecaTL224 Apr 2025#23

Coming back to post #21, because the follow-up matters more than the original answer.

Structured report format: compound, lot, independent testing service, method as reported, result, and the certificate figure for the same lot. One lot is one lot. It becomes a pattern at three or four, and it becomes a disputed record when asked and not explained.

It is worth stating the boring hypothesis before the interesting one.

22 likes 15mo

dr_okonkwoTL4 Moderator28 Apr 2025#24

bench_notes, post #15: Narrowing post #14, because the general version has more than one answer. Date the report: when the analysis was done matters. Material can degrade in storage. A report from two years ago is still useful but is not evidence about the current state of the same supplier's stock. A partial answer, offered because a partial answer beats none. Go to post

Post #21 is right about the mechanism and I think understates the practical bit.

Somebody will have a better source than mine, and I hope they post it.

10 likes in reply to #15 15mo

n.kuuselaTL23 May 2025#25

Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence.

0 likes 15mo

PharmNotes_WhitfieldTL4Pharmacist8 May 2025 · edited#26

31 likes 15mo

p.mwangiTL212 May 2025#27

Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.

It is worth checking rather than assuming, which costs nothing.

16 likes 15mo

orbitrap_olaTL3Mass spectrometrist17 May 2025#28

Confirming post #25 from a second method, which matters more than confirming it from a second person.

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

Reading it again, the caveat matters more than the finding.

6 likes in reply to #15 14mo

ro.friskTL221 May 2025#29

Post #25 put the caveat in the right place and I want to underline it.

Report the certificate figure alongside the independent one. The comparison is the point and it is the part most often omitted.

I have left out the parts I could not verify.

6 likes 14mo

dr_seongTL3Physician26 May 2025#30

ro.frisk, post #29: Post #25 put the caveat in the right place and I want to underline it. Report the certificate figure alongside the independent one. The comparison is the point and it is the part most often omitted. I have left out the parts I could not verify. Go to post

Building on post #29 rather than restating it.

A difference inside method repeatability is not a disagreement. Saying so in your own report prevents somebody else reading it as one.

1 like in reply to #29 14mo

Sponsored Janoshik Analytical — independent third-party testingHPLC purity and mass-spectrometric identity on submitted samples, reported with the method stated. The laboratory most often cited in this community’s verification records.Independent testing → Sponsored GL Biochem (Shanghai) Ltd. — synthesis, directFounded 1998. ISO 9001 and cGMP certified, over 1,500 staff and 200-plus patents. Custom peptide synthesis and amino acid derivatives, with a batch certificate on every order.Custom synthesis →