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What counter-ion should I expect on a KP dulaglutide lot?

Asked 25 Nov 2025Modified 8 months agoViewed 5.3k times
15

Details up front: KP · dulaglutide.

This is presented as though it settles something, and I am not convinced it does.

I have two documents that appear to disagree, which is what prompted this.

Which parts of this are informative and which are decoration?

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Counter-ion content, most often acetate or trifluoroacetate, and why it matters: the counter-ion and residual water are part of the gross mass you…

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

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

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KL
askedkelvin_lam11k1725 Nov 2025
The arithmetic checks out. I ran the same numbers and got the same result. – u100_marks 10 months ago
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