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vendor-vetting

Page 8 of 19 · 436 questions tagged vendor-vetting.

436 questions · sorted by votes · page 8 of 19

21 votes 5 answers34k views
Why did two SGN lots of retatrutide differ on content assay?

What I have: SGN · retatrutide. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and eliminated…

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 pip_okonjo 11k · 20 months ago
21 votes 5 answers29k views
What does a date of analysis on a CPC report change about how I read it?

For reference: date of analysis · CPC. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern is that I am…

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 rukhsana_iqbal 14k · 18 months ago
21 votes5 answers22k views
What should I make of a liraglutide certificate that has no chromatogram?

The particulars: liraglutide · chromatogram. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably…

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 micron22 36k · 21 months ago
21 votes4 answers20k views
Has anyone independently verified a WWB retatrutide batch COA?

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

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 dana_wexler 15k · 12 months ago
21 votes 4 answers18k views
Would you accept 98.2% on ecnoglutide from SWB without a content assay?

The particulars: 98.2% · ecnoglutide · SWB. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with explicit stopping…

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 fibre_or_fragment 12k · 2.3 years ago
21 votes 5 answers18k views
What should I make of an oral semaglutide certificate that has no list of related substances?

The specifics, since they change the answer: oral semaglutide · list of related substances. I want to understand what this actually establishes, as opposed to what it…

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 teodora_ilic 15k · 2.1 years ago
21 votes 4 answers12k views
Has anyone independently verified a KP orforglipron batch COA?

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

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 mateo_iglesias 16k · 3 months ago
21 votes0 answers9.7k views
Would you accept 98.2% on liraglutide from ERP without a content assay?

The case in front of me: 98.2% · liraglutide · ERP. 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 shear_at_the_front 15k · 10 months ago
21 votes4 answers8.9k views
What does a batch certificate on an ERP report change about how I read it?

What I have: batch certificate · ERP. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to disagree,…

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 cold_lane 14k · 5 months ago
21 votes0 answers7.1k views
Would you accept 98.2% on mazdutide from QST without a content assay?

Stated plainly: 98.2% · mazdutide · QST. I am trying to build something sustainable rather than something thorough that I will abandon. I have already decided the…

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_Jonas_Halvorsen 41k · 10 months ago
20 votes5 answers39k views
How does BCH compare to Shanghai Sigma-Audley on documentation quality?

What I am working with: BCH · Shanghai Sigma-Audley. Both of these get recommended confidently by different people, which suggests neither is obviously right. My…

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 fiadh_cronin 14k · 2.3 years ago
20 votes 4 answers31k views
How do I trace a CPC lot number back to a synthesis date?

The method section is present, which is unusual enough that I want to make use of it. I am trying to do this correctly the first time rather than learn it by getting…

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 priya_menon 11k · 23 months ago
20 votes 3 answers29k views
Why do research suppliers ask for crypto, and what does a stablecoin transfer actually reveal about me?

Two things I have been told confidently and suspect are both wrong. First, that suppliers ask for crypto "because it is untraceable". That cannot be right for a…

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
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
research-use-only
research-use-only

What "for research use only" means as a legal and practical designation: not approved for human use, no pharmacopoeial release testing, no…

91 questions
asked by cap_the_luer 15k · 20 months ago
20 votes5 answers26k views
How does SGN compare to Bachem Holding (Suzhou) on documentation quality?

What I have: SGN · Bachem Holding (Suzhou). I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…

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 swab_stopper 16k · 13 months ago
20 votes5 answers24k views
How do I trace an HJ lot number back to a synthesis date?

The method section is present, which is unusual enough that I want to make use of it. I have done this once and I suspect I got away with it rather than got it right.…

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 greta_holzmann 15k · 21 months ago
20 votes 5 answers19k views
Has anyone independently verified a QST liraglutide batch COA?

Conditions: QST · liraglutide. I want to know whether there is evidence behind this or only repetition. I have checked the obvious registries and monographs without…

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 ekaterina_volk 16k · 15 months ago
20 votes 5 answers17k views
Does SSA issue lot-specific documentation, or a batch certificate?

I have the report as a PDF with the chromatogram on page two, so I can quote specifics. I have the document in front of me and I can read the numbers. What I cannot…

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 orla_sheridan 14k · 13 months ago
20 votes5 answers16k views
Has anyone independently verified a BCH cagrilintide batch COA?

Stated plainly: BCH · cagrilintide. This is asserted often enough that I assumed it was established, and then I went looking for the source. I have searched the…

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 colm_dunphy 16k · 2.3 years ago
20 votes 3 answers14k views
What should a certificate of analysis contain to be worth reading?

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…

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
residual-solvent
residual-solvent

Solvents left behind by synthesis and purification - acetonitrile, TFA, DMF, DCM - their ICH limits, how they are measured by headspace GC, and…

14 questions
asked by linnea_wahlberg 14k · 23 months ago
20 votes5 answers12k views
How does WXT compare to Shanghai Sigma-Audley on documentation quality?

Stated plainly: WXT · Shanghai Sigma-Audley. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain either…

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 triple_agonist_q 37k · 21 months ago
20 votes 5 answers11k views
Would you accept 96.4% on cagrilintide from CPC without a content assay?

What I am working with: 96.4% · cagrilintide · CPC. I am trying to build something sustainable rather than something thorough that I will abandon. I have already…

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 anja_hellstrom 13k · 3 months ago
20 votes 5 answers9.3k views
What would change my mind about a vendor I currently trust?

The lane and the lead time matter as much as the material for what I am doing. I would like to define my thresholds before I have a result, for obvious reasons. I…

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
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
asked by pk_curve 12k · 8 months ago
20 votes 2 answers8.4k views
Does a large published testing history at GGPeps imply lot consistency?

This is my second independent submission on material from the same supplier. I understand the observation; what I do not understand is the mechanism behind it. 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
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 bounty_hunter_q 18k · 2 months ago
20 votes 5 answers8.4k views
What should I make of an orforglipron certificate that has no sampling plan?

Setup, so nobody has to ask: orforglipron · sampling plan. I have read the primary source rather than the summary, which has left me with more questions. I understand…

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 threadlock7 14k · 4 months ago