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

[Discussion] the packaging advice in here is 2 years out of date

Discussionbranch of 10 comments

the packaging advice in here is 2 years out of date — a position I have arrived at slowly and would like tested. Numbers, in the order they matter: 2 years. Wrote the reconstitution date on the vial for the first time last year. Have never once since wondered how old a solution is. Asked GGPeps which lines they hold…

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10 comments, started 1 year ago
u/kian_solberg648 points·1 year ago

Gel packs are designed for a duty cycle. A liquid pack at the end of a longer-than-expected transit is a pack behaving as specified, not evidence of an excursion in the vial.

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u/coldchain_karenMOD343 points·1 year ago

Left up and added to the lane table. Origin, destination and month were all included, which is all we ask.

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u/anjali_tamm91 points·1 year ago

a summer lane and a winter lane are different lanes

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u/nils_ferreira56 points·1 year ago

A transit temperature logger records a distribution, and time above a threshold matters as much as peak temperature. That is the argument for logging rather than guessing.

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u/plain_titration_202422 points·1 year ago

Yes — reconstitution date on the vial. It is the number you will want and cannot reconstruct.

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u/ice_pack_auditOPcold chain-14 points·1 year ago

A transit temperature logger records a distribution, and time above a threshold matters as much as peak temperature.

nils_ferreira is right that the pack failing is not the material failing. Two separate claims.

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u/bastian_ekstrom279 points·1 year ago

Careful. "The cold chain failed" is a strong claim and the evidence you have is a warm box.

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u/anya_salgado318 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/soren_yildiz213 points·1 year ago

That is a lane problem rather than a packaging problem, and the fixes are different.

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u/ice_pack_auditOPcold chain192 points·1 year ago

the door shelf is the worst place in the fridge

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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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