Worth separating two things that post #117 runs together.
Freeze-thaw: some peptides tolerate freezing; others do not. Check your compound's labelling. Generally, repeated freeze-thaw is worse than single freeze-thaw.
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Devices · Cold chain · continued
Temperature loggers worth the money — the long version posts 121–128
This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.
Assessing an excursion: if a package sat at room temperature for a time, visual inspection (cloudiness, discoloration, particles) can alert you to problems. Not visible does not mean not damaged, but visible problems are a reason to contact the supplier.
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e.mbeki, post #102: This follows post #99 rather than contradicting it. Shipping container and cold packs: reputable suppliers use insulated containers with cold packs designed to arrive cool. Checking on arrival that cold packs are still cold is a sign the chain was maintained. Go to post
Domestic refrigeration: most lyophilised peptides are stored at 2–8 °C (35–46 °F). That is standard refrigerator temperature. Check your refrigerator's actual temperature; some are warmer than the label.
This follows post #121 rather than contradicting it.
Shipping container and cold packs: reputable suppliers use insulated containers with cold packs designed to arrive cool. Checking on arrival that cold packs are still cold is a sign the chain was maintained.
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On post #121 — agreed on the reasoning, with one qualification.
Shipment during summer or to hot climates: consider shipping to a cold-storage facility rather than to home if temperatures will be high. Alternatively, time shipment to arrive when you can refrigerate immediately.
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Collapsed as off-topic by two members at trust level 3 or above
post #125 answers the question as asked. The question underneath it is different.
Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.
KAndersson, post #118: Travel with medication: carrying a vial across borders requires planning if temperatures will exceed the range or if journey time is long. Insulated travel cases with ice packs are common solutions. Go to post
Assessing an excursion: if a package sat at room temperature for a time, visual inspection (cloudiness, discoloration, particles) can alert you to problems. Not visible does not mean not damaged, but visible problems are a reason to contact the supplier.
Knowlton, post #91: Travel with medication: carrying a vial across borders requires planning if temperatures will exceed the range or if journey time is long. Insulated travel cases with ice packs are common solutions. Go to post
Temperature logging: devices that record temperature over time let you confirm cold chain was maintained. Useful if a shipment was delayed or if you are concerned about excursion.
This topic was referenced in
- Domestic fridge temperature mapping: a cheap experimentDevices › Cold chain · 2 replies
- A fridge failure and how I assessed the contents afterwardsDevices › Cold chain · 18 replies
This topic was closed 30 days after the last reply. Closing is automatic for quiet topics so that a settled answer does not collect new questions underneath it. If you have a follow-up, open a new topic and link back to this one — that keeps both readable and gives your question its own title.
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