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c/coldchain·submitted 11 months ago by u/anders_karlsen

ice pack: what the trials say vs what this community says

Questionbranch of 12 comments

Right, the data logger question again, but with numbers this time. I have 17 data points over 12 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign. The thing I would flag for anyone new: the effect I am…

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12 comments, started 11 months ago
u/sterile_field_steph23 points·11 months ago
okay but what dose
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u/ice_pack_auditcold chain9 points·11 months ago

no tracking numbers, no full addresses, no label photos — instant removal

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u/anya_salgado2 points·11 months ago

time-at-temperature integral is the dose, not just peak temperature

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u/sten_palacios3 points·11 months ago

the logger trace is the data that matters, not the packaging promises

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u/hplc_hobbyistruns their own column2 points·11 months ago

Reconstituted or dry powder?

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u/britt_okwuosa1 point·11 months ago

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

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u/tidy_vialdrawer_watch28-29 points·11 months ago

That is net peptide content, not purity. Different number, different meaning.

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u/kian_ekstrom7 points·11 months ago·edited

no tracking numbers, no full addresses, no label photos — instant removal

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u/andres_restrepo6 points·11 months ago

lyophilised powder is far more forgiving than reconstituted solution

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u/maren_sorensen2 points·11 months ago

data logger is the standard, gut feeling is not

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u/ice_pack_auditcold chain6 points·11 months ago

stability after excursion is not zero, it is dose-dependent

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u/cato_batista8 points·11 months ago

okay but what dose

Disagree on that part. 95.1% and 96.8% on the same vial is normal.

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Temperature and stability in the real world: what an excursion actually costs you, why lyophilised powder is far more forgiving than reconstituted solution, how to read a logger CSV, and how to photograph a failed shipment so the conversation with the vendor is short.

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  1. Excursion claims need a logger trace or a photo taken at unboxing. "It felt warm" is not data.
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