Recommendations for a peptide storage freezer?

Pep Enthusiast said:

For $150, I picked up a Whytner 1.1 cu freezer. It doesn't take up much room, yet it still has enough capacity for a decent quantity of peptides.
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The built-in locks on these are a plus for me. I was considering ordering one from Amazon, but I haven't settled on which size to choose. From what I can see, they come in 1.1, 2.1 and 3.0.
 
SamsHere said:

For long-term storage of peptides that are powdered and lyophilized, I believe the standard maximum temperature is -20C rather than -20F. When it comes to very long-term storage, lab freezers run at -80C.

-20C* = 4F*

Lyophilized Storage Conditions​#-lyophilized-storage-conditionsRefrigerated (2–8 °C). Works for the majority of lyophilized peptides across a span of months.

Frozen (−20 °C). The best option for keeping peptides long term. At −20 °C, lyophilized peptides stay stable for years instead of months. If you need to extend the timeline further, frozen storage is the cautious pick.

Ultra-low (−80 °C). This is the benchmark for very long-term storage of samples that are high-value. Outside institutional laboratories, ultra-low freezers are not common; for most facilities, −20 °C is the realistic limit.
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Small fix: -20°C is -4°F. Still, -20°C is far more sensible. I figure I can put a future mini chest freezer on its second-lowest setting, which should land it near -20°C.

Flash-BCR said:

You're right....the figure to look for when buying is -7f * = -20c *....if editing were still available, I'd go back and fix every one of my earlier posts...

as I've said in other threads, "I blame the pain meds" 😳 ....apologies for the mix-up and thanks for the help....
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Things would be much simpler if everyone used metric across the board. 😉 Oh well...
 
Unless you're planning to pass your peps down to your grandchildren, -70C is far more than you need. At -20C, they should keep for years without issue. Honestly, if you're truly worried, liquid nitrogen would do the trick. 😉
 
Flash-BCR said:

Honestly, just head to Amazon or the website of any large appliance retailer... run a search for small 'chest freezer' units... in the 1.5 to 5 cu ft range.... Check the specs for 'manual defrost' (that means you empty it out, let the frost melt, and drain the water)... and for a temperature range reaching a 'minimum of -20f*' (a lot of models in this size class won't go that low)

Top-loading chest freezers are the better choice, since the cold air stays inside when you lift the lid instead of spilling out the way it does with a front-loading unit...

Manual defrost... 'frost free' freezers run a warming cycle, which in theory could damage peptides through repeated freezing and warming...

Mine is a 2 cu ft chest freezer that holds a steady -22f * ... I'm still filling it with peps, but it ought to fit 2 cases of 20 kits each (for long storage at the bottom)... plus 12-14 cases holding 70 vials each... I'm not certain it'll fit everything, but it will fit most of it...

I believe I paid $160 on Amazon Prime Day.......gl...
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Honestly, I really doubt that a regular home freezer — one that runs at 0 or colder and then "warms up" twice a day for its defrost cycle (mine climbs to roughly 10 degrees) — does any damage to peptides. Once something is frozen, it's frozen. Even if the defrost cycle pushes the temperature up to 32, the food and the peptides sitting in their tight little freezer containers have plenty of thermal mass, so they aren't going to suddenly unfreeze during such a brief cycle. That said, most newer freezers never come close to that warm anyway — my malfunctioning freezer that I just swapped out never went past 20 while defrosting. The only heat a freezer makes is just enough to clear the frost off its coils.
 
spanky2026 said:

Honestly, I really doubt that a regular home freezer — one that runs at 0 or colder and then "warms up" twice a day for its defrost cycle (mine climbs to roughly 10 degrees) — does any damage to peptides. Once something is frozen, it's frozen. Even if the defrost cycle pushes the temperature up to 32, the food and the peptides sitting in their tight little freezer containers have plenty of thermal mass, so they aren't going to suddenly unfreeze during such a brief cycle. That said, most newer freezers never come close to that warm anyway — my malfunctioning freezer that I just swapped out never went past 20 while defrosting. The only heat a freezer makes is just enough to clear the frost off its coils.
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Right...a kitchen frost-free freezer would work fine if I just kept everything inside an insulated container....The Hoard® won't fit in one of those, though, so I picked up the small chest freezer made specifically for peptides, and its specs suited that use perfectly......and as I mentioned, I believe it cost me $159 during Amazon Prime Day..... 😎 👍
 
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