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vendor-vetting

Page 17 of 19 · 436 questions tagged vendor-vetting.

436 questions · sorted by votes · page 17 of 19

6 votes0 answers5.1k views
How do I trace a QYB lot number back to a synthesis date?

I have the report as a PDF with the chromatogram on page two, so I can quote specifics. I want a method I can write down and repeat, not a rule of thumb. I would…

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 ben_akintola 14k · 19 months ago
6 votes 4 answers4.9k views
How do I trace a GGPeps lot number back to a synthesis date?

I have the report as a PDF with the chromatogram on page two, so I can quote specifics. I want a method I can write down and repeat, not a rule of thumb. I would…

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 Dr_Aoife_Brennan 50k · 5 months ago
6 votes 5 answers4.7k views
How do I trace a TFC 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 loss_on_drying 47k · 32 days ago
6 votes 5 answers4.7k views
Why did two ERP lots of cagrilintide differ on content assay?

What I am working with: ERP · cagrilintide. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have photographed…

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 label_claim 11k · 11 months ago
6 votes 4 answers3.3k views
Does FGP 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 label_claim 11k · 4 months ago
6 votes0 answers3.1k views
Does QYB issue lot-specific documentation, or a batch certificate?

I have both a purity figure and a content figure, which is why the discrepancy is visible. I have the document in front of me and I can read the numbers. What 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
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 Dr_Fatima_Belkacem 52k · 15 months ago
6 votes 3 answers2.1k views
Has anyone independently verified a WWB tirzepatide batch COA?

I have kept every message, invoice and document, which I gather is the useful habit. I would rather be corrected now than propagate something wrong. I am specifically…

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 lukas_sedlacek 17k · 5 months ago
6 votes 5 answers2k views
What should I make of a survodutide certificate that has no method section?

Concretely: survodutide · method section. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single…

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 nadia_kowalczyk 14k · 3 months ago
5 votes 5 answers23k views
Would you accept 98.8% on tirzepatide from WXT without a content assay?

Conditions: 98.8% · tirzepatide · WXT. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like 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 bea_forsberg 14k · 2.1 years ago
5 votes 5 answers17k views
Does HJ issue lot-specific documentation, or a batch certificate?

The lot number on the vial matches the certificate, which at least rules out the easy problem. I would like to know the limits of what can be inferred from this. What…

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 ivo_paunovic 15k · 16 months ago
5 votes5 answers9.7k views
What does a purity figure on a JEEP report change about how I read it?

What I am working with: purity figure · JEEP. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…

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 eighty_six_hours 16k · 6 months ago
5 votes 5 answers8.1k views
Why is "semaglutide sodium" a red flag on a compounded label?

The pharmacy is accredited and I have verified that on the accreditor register. I have read the primary source rather than the summary, which has left me with more…

compounding
compounding

Compounded preparations: what a 503A and a 503B facility may legally prepare and when, base versus salt forms, beyond-use dating under USP…

61 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
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 cake_collapsed 13k · 2.1 years ago
5 votes0 answers7.5k views
How should a twenty-person split be structured so a later dispute is resolvable?

I am comparing three suppliers on documentation rather than on price. I am trying to do this correctly the first time rather than learn it by getting it wrong. I have…

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
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
asked by loss_on_drying 47k · 2.3 years ago
5 votes 5 answers5.1k views
What does a chromatogram on an MKM report change about how I read it?

Conditions: chromatogram · MKM. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single result, which I…

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 h_villanueva 50k · 5 months ago
5 votes 2 answers4.9k views
Would you accept 99.1% on liraglutide from FGP without a content assay?

The case in front of me: 99.1% · liraglutide · FGP. 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 sample_id 17k · 6 months ago
5 votes4 answers4.6k views
Why did two BCH lots of a GLP-1 receptor agonist differ on content assay?

Stated plainly: BCH · a GLP-1 receptor agonist. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded…

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 rania_haddad 17k · 5 months ago
5 votes0 answers1.2k views
Is a batch certificate the same claim as a vial certificate?

I am comparing a supplier certificate against an independent result on the same lot. Both of these get recommended confidently by different people, which suggests…

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 unit_math 13k · 7 months ago
4 votes 5 answers24k views
How does SGN compare to WuXi TIDES on documentation quality?

Numbers first: SGN · WuXi TIDES. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a defensible reason than a…

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 ravi_pillai 16k · 2.1 years ago
4 votes 5 answers13k views
Is a PeptideMeter rating independent of the vendors it rates?

This is my second independent submission on material from the same supplier. I would like to know whether this claim survives contact with evidence. If the answer is…

peptidemeter
peptidemeter

PeptideMeter, an independent peptide analytics and vendor-rating service. Use this tag for its published datasets, its rating methodology, and how…

14 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
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
asked by coring_risk 17k · 2.2 years ago
4 votes5 answers5.5k views
How does JEEP compare to Shanghai ERP Biotechnology on documentation quality?

Numbers first: JEEP · Shanghai ERP Biotechnology. 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 vial_five 15k · 5 months ago
4 votes3 answers4.6k views
What would you ask Sangon Biotech (Shanghai) before a first order that they cannot fake?

I have kept every message, invoice and document, which I gather is the useful habit. I would like to understand the steps well enough to explain them to someone else.…

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 dead_volume 49k · 21 months ago
4 votes5 answers3.7k views
What does PeptideMeter verification of Hunan Aslsen Technology actually cover?

The particulars: PeptideMeter · Hunan Aslsen Technology. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am…

vendor-investigate
vendor-investigate

VendorInvestigate, an independent vendor review and verification service. Use this tag for questions about its verification criteria, what a…

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
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
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 Dr_Otto_Lindqvist 38k · 3 months ago
4 votes 5 answers3.1k views
Which red flags on a certificate are actually diagnostic?

This is a first order from this supplier, so I have no track record to reason from. I have read the primary source rather than the summary, which has left me with…

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 cold_lane 14k · 18 days ago
4 votes0 answers2.6k views
How does HJ compare to Wuhan Wansheng Biotechnology on documentation quality?

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

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 leah_ferrers 15k · 7 months ago