r.sobczak
TL2 Moderator · Essen
Contributes reviews on supplier material. Based in Essen.
Joined 14 July 2025 · last posted 10d
98Posts here
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2Solutions
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A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #43 · Sourcing › Red flags · 4 Jun 2026 · 33 likes Worth separating two things that post #39 runs together. Patterns that reliably precede a problem: underdosing (less active material than stated, documented by…
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Preservatives: function, testing, and limits Replied, post #28 · Pharmacology › Formulation chemistry · 5 Apr 2025 · 33 likes post #27 answers the question as asked. The question underneath it is different. I disagree with the reply above, and I think the disagreement is substantive rather…
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[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #5 · Evidence › Journal club · 8 Aug 2025 · 32 likes post #4 answers the question as asked. The question underneath it is different. PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not…
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Assessing a warm arrival: the decision process Replied, post #11 · Sourcing › Logistics · 8 Mar 2025 · 32 likes Coming back to post #9, because the follow-up matters more than the original answer. Two things before anyone answers the substance. First, the context in the first…
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Validating a method you did not develop — does this still hold? Replied, post #29 · Analytics › Method validation · 21 Feb 2025 · 32 likes Specificity: the method can distinguish the intended compound from related impurities and degradation products. Tested by comparing results on pure compounds, mixtures…
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How to read a phase 2 result without treating it as a phase 3 result Replied, post #32 · Compounds › Retatrutide · 24 Dec 2025 · 30 likes Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that…
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Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 15 Jul 2025 |
| First Reply | bronze | 17 Jul 2025 |
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| First Topic | bronze | 6 Aug 2025 |
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| Nice Post | bronze | 12 Jan 2026 |
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| Welcoming | silver | 20 Jan 2026 |
| Good Post | silver | 2 Mar 2026 |
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| Anniversary | silver | 14 Jul 2026 |
| De-escalator | gold | 27 Jul 2026 |