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vendor-vetting

Page 10 of 19 · 436 questions tagged vendor-vetting.

436 questions · sorted by votes · page 10 of 19

18 votes 4 answers13k views
Has anyone independently verified a KP dulaglutide batch COA?

What I have: KP · dulaglutide. I would rather be corrected now than propagate something wrong. I am specifically not interested in a testimonial; I am interested in a…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by kelvin_lam 11k · 6 months ago
18 votes5 answers12k views
Would you accept 96.8% on liraglutide from QSC without a content assay?

The case in front of me: 96.8% · liraglutide · QSC. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by rune_thoresen 14k · 19 months ago
18 votes 5 answers11k views
What would you ask Bachem Holding (Suzhou) before a first order that they cannot fake?

I would rather spend on verification than on volume. I have done this once and I suspect I got away with it rather than got it right. For context: I keep records of…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by tare_and_weigh 18k · 3 months ago
18 votes 5 answers9.2k views
Has anyone independently verified a QSC mazdutide batch COA?

Stated plainly: QSC · mazdutide. This has the shape of a fact but I cannot find its origin. What I found instead were three secondary sources all citing each other.…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by nynke_dekker 18k · 2 months ago
18 votes 5 answers8.9k views
How does TFC compare to Wuhan Wansheng Biotechnology on documentation quality?

The case in front of me: TFC · Wuhan Wansheng Biotechnology. I would like the axes of comparison first and the recommendation second. I have tried the first option…

vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by esther_vandeVelde 49k · 6 months ago
18 votes 2 answers7.9k views
Does WXT issue lot-specific documentation, or a batch certificate?

The method section is present, which is unusual enough that I want to make use of it. I would like help reading this properly rather than being told what conclusion…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by teodora_ilic 15k · 2 months ago
18 votes0 answers7.7k views
How does QYB compare to Qingdao Saber Technology on documentation quality?

For reference: QYB · Qingdao Saber Technology. I am trying to choose between two options that are usually discussed as though only one exists. I am not optimising for…

vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by wren_calloway 14k · 7 months ago
18 votes 3 answers5.2k views
How does WXT compare to Xi’an Mokemei Biotechnology on documentation quality?

Setup, so nobody has to ask: WXT · Xi’an Mokemei Biotechnology. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…

vendor-comparison
vendor-comparison

Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,…

351 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by zainab_mustafa 16k · 42 days ago
17 votes5 answers35k views
Does a large published testing history at SGN imply lot consistency?

I have the report as a PDF with the chromatogram on page two, so I can quote specifics. I suspect the usual explanation for this is wrong, or at least incomplete. I…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
asked by klara_novotna 16k · 2.1 years ago
17 votes 2 answers32k views
How do I trace a KP lot number back to a synthesis date?

This is my second independent submission on material from the same supplier. I would like to understand the steps well enough to explain them to someone else. I have…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by sinead_gaffney 14k · 2.4 years ago
17 votes 5 answers29k views
Would you accept 98.2% on dulaglutide from SSA without a content assay?

What I have: 98.2% · dulaglutide · SSA. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can tell me which work…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by dermot_kiely 14k · 2.4 years ago
17 votes3 answers23k views
If a crypto payment cannot be reversed, what replaces the chargeback — and do escrow or group-buy structures actually work?

The thing that stops me going ahead is not the price, it is that I would be sending money with no recourse whatsoever. With a card I have a dispute right; if nothing…

payment-privacy
payment-privacy

Payment mechanics and their privacy properties: why suppliers ask for stablecoin transfers, what an on-chain transfer reveals, confirmation…

31 questions
group-buy
group-buy

Pooled purchasing: how the economics work, what trust structure a pool needs, splitting a single tested lot, and the failure modes when the…

41 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by gel_pack_warm 13k · 11 months ago
17 votes 5 answers21k views
Would you accept 99.1% on mazdutide from TFC without a content assay?

Setup, so nobody has to ask: 99.1% · mazdutide · TFC. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight,…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by anouk_desmet 18k · 13 months ago
17 votes 5 answers15k views
How do I trace a QST lot number back to a synthesis date?

The lot number on the vial matches the certificate, which at least rules out the easy problem. I have done this once and I suspect I got away with it rather than got…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by jo_vandeberg 19k · 12 months ago
17 votes 5 answers13k views
Why did two QYB lots of semaglutide differ on content assay?

The particulars: QYB · semaglutide. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I understood…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by RP_C18 85k · 6 months ago
17 votes5 answers11k views
Does SWB issue lot-specific documentation, or a batch certificate?

This is my second independent submission on material from the same supplier. This is presented as though it settles something, and I am not convinced it does. I have…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by fiadh_cronin 14k · 9 months ago
17 votes 5 answers7.8k views
Has anyone independently verified a CPC oral semaglutide batch COA?

The case in front of me: CPC · oral semaglutide. I want to know whether there is evidence behind this or only repetition. I have checked the obvious registries and…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by fib4_reader 35k · 3 months ago
17 votes5 answers7.6k views
What should I make of a cagrilintide certificate that has no lot-specific certificate?

What I have: cagrilintide · lot-specific certificate. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone…

coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by Dr_Lena_Ostrowska 42k · 10 months ago
17 votes 5 answers4.4k views
What does a list of related substances on an SSA report change about how I read it?

Conditions: list of related substances · SSA. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…

coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by anders_vestby 17k · 4 months ago
17 votes0 answers4k views
Has anyone independently verified a BCH a GLP-1 receptor agonist batch COA?

What I am working with: BCH · a GLP-1 receptor agonist. This has the shape of a fact but I cannot find its origin. What I found instead were three secondary sources…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by nils_karlberg 13k · 7 months ago
16 votes5 answers30k views
Why did two SWB lots of orforglipron differ on content assay?

Numbers first: SWB · orforglipron. Before I write this off, I want to check whether it is a known failure mode. I have the lot number, the certificate and the date,…

batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by k_szabo 45k · 19 months ago
16 votes 5 answers22k views
Has anyone independently verified a GL Biochem semaglutide batch COA?

For reference: GL Biochem · semaglutide. Somebody stated this to me confidently and I would like to check it before repeating it. I would accept a well-reasoned…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by plunger_stop 18k · 13 months ago
16 votes 5 answers21k views
Would you accept 96.8% on survodutide from WWB without a content assay?

The specifics, since they change the answer: 96.8% · survodutide · WWB. I am at the decision point and I would rather think it through than improvise. I would rather…

purity
purity

Purity as chromatographic area per cent - the fraction of detected material that is your target peak. It says nothing about how much material is…

788 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

438 questions
vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
asked by Dr_Sara_Kuusela 46k · 18 months ago
16 votes 5 answers19k views
Has anyone independently verified an SGN orforglipron batch COA?

Numbers first: SGN · orforglipron. I am asking for verification rather than opinion, ideally with something I can read myself. It is possible the evidence exists and…

vendor-vetting
vendor-vetting

Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures…

436 questions
coa
coa

Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot…

749 questions
batch-testing
batch-testing

Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference…

865 questions
asked by charge_state_3 39k · 12 months ago