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c/coldchain·submitted 1 year ago by u/osman_eriksen

the ice pack question that gets asked weekly, answered properly

Questionbranch of 6 comments

the ice pack question that gets asked weekly, answered properly — a position I have arrived at slowly and would like tested. Kept a vial at room temperature for eleven days by accident. Tested it out of guilt. It was fine. Wrote the reconstitution date on the vial for the first time last year. Have never once since…

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6 comments, started 1 year ago
u/ewan_tulloch232 points·1 year ago

Moved everything off the fridge door after reading a thread here and my temperature log immediately got boring.

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u/noor_cardoso157 points·1 year ago

Same. Door shelf is the worst place in the fridge and it is where everybody puts them.

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u/gustav_vermeulen64 points·1 year ago

A stability statement is only meaningful with its conditions attached: temperature, duration, light exposure, and whether it covers powder or solution. Ask which.

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u/osman_eriksenOP272 points·1 year ago

Gel pack fully liquid on arrival, powder tested 98.4% against a claimed 97.5% afterwards. The pack had done its job for as long as it was designed to.

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u/cato_batista-9 points·1 year ago

regional stock removes most of this problem entirely

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u/osman_eriksenOP160 points·1 year ago

Small fix — refrigerated, not frozen, once it is in solution.

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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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