Practice · subcategory

Storage & stability

Refrigeration, excursions, light exposure, freeze-thaw, beyond-use dating, and what published stability data actually covers.

30 topics1,461 posts8 solved Moderators: t.vasquez, hana.sato About this category

storage temperature excursion cold chain freeze-thaw beyond-use date cloudy or discoloured solution

30 topics

Topic	Participants	Replies	Views	Activity
Coming back to: What published stability data actually covers, and what it does not cold chain freeze-thaw storage beyond-use date Solved Closed The question in the title: What published stability data actually covers, and what it does not I will give what I have already checked below so nobody repeats it. Practical question with the units stated,…	+136	148	20k	10mo
A reconstituted vial's beyond-use date and the reasoning behind common figures temperature excursion storage freeze-thaw Posting this under the heading it deserves: A reconstituted vial's beyond-use date and the reasoning behind common figures Everything below is what sits behind that. Practical question with the units stated,…	+125	129	45k	2mo
[2026 update] Storing lyophilised material long term: what governs the shelf life beyond-use date freeze-thaw cold chain cloudy or discoloured solution Storing lyophilised material long term: what governs the shelf life — setting out what I have, and where I think it stops being reliable. A question about technique rather than about dose. I have been doing…	+122	133	35k	1mo
A parcel that arrived warm: a decision process, not a verdict cold chain beyond-use date storage freeze-thaw Solved A parcel that arrived warm: a decision process, not a verdict Writing it up because I had to work it out twice and would rather nobody else did. A question about technique rather than about dose. I have been…	+130	140	12k	8mo
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile beyond-use date freeze-thaw cloudy or discoloured solution storage Closed On the subject in the title: Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Working notes rather than a conclusion. Practical question with the units stated,…	+77	87	58k	4mo
[2026 update] Does a peptide degrade silently, with no visual change? temperature excursion storage freeze-thaw cold chain Does a peptide degrade silently, with no visual change? — that is the question, and I have not found it answered plainly anywhere I have looked. I have read the maintained page on this and I still have a gap,…	+82	86	24k	15d
Power cut for eleven hours: how I assessed it afterwards beyond-use date freeze-thaw storage cloudy or discoloured solution Posting this under the heading it deserves: Power cut for eleven hours: how I assessed it afterwards Everything below is what sits behind that. Practical question with the units stated, because I have seen…	+102	109	1.4k	9mo
Transporting a vial for a weekend away — a second dataset storage cold chain beyond-use date Transporting a vial for a weekend away — a second dataset Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I have seen how…	+74	84	5.1k	1mo
Freeze-thaw and why one cycle is not the same as five — a second dataset storage beyond-use date freeze-thaw Freeze-thaw and why one cycle is not the same as five — a second dataset — setting out what I have, and where I think it stops being reliable. Practical question with the units stated, because I have seen how…	+47	55	46k	10mo
Does a peptide degrade silently, with no visual change? beyond-use date cold chain temperature excursion freeze-thaw Solved Does a peptide degrade silently, with no visual change? I have a specific reason for asking rather than idle curiosity, and the context is below. I have read the maintained page on this and I still have a…	+73	79	1.3k	1d
Storing lyophilised material long term: what governs the shelf life temperature excursion cold chain freeze-thaw On the subject in the title: Storing lyophilised material long term: what governs the shelf life Working notes rather than a conclusion. Practical question with the units stated, because I have seen how…	+83	90	1k	5mo
Transporting a vial for a weekend away temperature excursion freeze-thaw beyond-use date cloudy or discoloured solution Closed On the subject in the title: Transporting a vial for a weekend away Working notes rather than a conclusion. Practical question with the units stated, because I have seen how quickly these go wrong without…	+39	45	35k	21mo
Revisiting: Mean kinetic temperature explained without the mathematics storage cold chain temperature excursion cloudy or discoloured solution Solved Revisiting: Mean kinetic temperature explained without the mathematics Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I…	+67	75	909	2mo
Follow-up: A parcel that arrived warm: a decision process, not a verdict temperature excursion cloudy or discoloured solution beyond-use date Posting this under the heading it deserves: A parcel that arrived warm: a decision process, not a verdict Everything below is what sits behind that. A question about technique rather than about dose. I have…	+49	59	1.2k	2mo
Freeze-thaw and why one cycle is not the same as five beyond-use date freeze-thaw cloudy or discoloured solution storage On the subject in the title: Freeze-thaw and why one cycle is not the same as five Working notes rather than a conclusion. I have read the maintained page on this and I still have a gap, so I am asking rather…	+21	25	41k	8mo
Refrigerated versus room temperature: the trade-off stated plainly cold chain cloudy or discoloured solution storage beyond-use date Refrigerated versus room temperature: the trade-off stated plainly Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I have…		2	66k	2y
About the Storage & stability category storage temperature excursion cold chain Pinned Wiki Refrigeration, excursions, light exposure, freeze-thaw, beyond-use dating, and what published stability data actually covers. This post is a community wiki: any member at trust level 3 or above can edit it,…		4	57k	4mo
What published stability data actually covers, and what it does not — what changed since freeze-thaw storage temperature excursion cloudy or discoloured solution Solved What published stability data actually covers, and what it does not — what changed since — that is the question, and I have not found it answered plainly anywhere I have looked. Practical question with the…		3	43k	6mo
Second pass at: Temperature logging at home: what is worth the effort temperature excursion cloudy or discoloured solution freeze-thaw cold chain Posting this under the heading it deserves: Second pass at: Temperature logging at home: what is worth the effort Everything below is what sits behind that. Reporting something rather than asking about it, in…	+4	8	29k	1mo
Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures beyond-use date cold chain temperature excursion freeze-thaw Solved Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the…	+4	8	20k	8mo
Adsorptive losses at low concentration, and why dilute solutions are fragile storage cold chain beyond-use date Adsorptive losses at low concentration, and why dilute solutions are fragile — setting out what I have, and where I think it stops being reliable. A question about technique rather than about dose. I have…	+16	20	1.7k	4mo
Coming back to: Light exposure: how much protection is proportionate? temperature excursion cold chain freeze-thaw cloudy or discoloured solution Asking directly, because I could not find a straight answer: Light exposure: how much protection is proportionate? Practical question with the units stated, because I have seen how quickly these go wrong…	+5	10	13k	2d
What published stability data actually covers, and what it does not cloudy or discoloured solution freeze-thaw beyond-use date Solved Asking directly, because I could not find a straight answer: What published stability data actually covers, and what it does not Reporting something rather than asking about it, in case the pattern is useful…	+8	12	435	1d
Storing in the door of the fridge is worse than you think cold chain beyond-use date storage freeze-thaw Solved Storing in the door of the fridge is worse than you think Writing it up because I had to work it out twice and would rather nobody else did. A question about technique rather than about dose. I have been…		2	8.3k	5mo
Temperature logging at home: what is worth the effort storage beyond-use date cloudy or discoloured solution temperature excursion Temperature logging at home: what is worth the effort — setting out what I have, and where I think it stops being reliable. Practical question with the units stated, because I have seen how quickly these go…		2	6.3k	7mo
Coming back to: Storing in the door of the fridge is worse than you think temperature excursion cold chain cloudy or discoloured solution Wiki On the subject in the title: Storing in the door of the fridge is worse than you think Working notes rather than a conclusion. I have read the maintained page on this and I still have a gap, so I am asking…	+2	6	2.1k	1d
Revisiting: Power cut for eleven hours: how I assessed it afterwards storage freeze-thaw beyond-use date cloudy or discoloured solution Revisiting: Power cut for eleven hours: how I assessed it afterwards — setting out what I have, and where I think it stops being reliable. A question about technique rather than about dose. I have been doing…		4	195	9mo
Mean kinetic temperature explained without the mathematics temperature excursion freeze-thaw storage cloudy or discoloured solution Posting this under the heading it deserves: Mean kinetic temperature explained without the mathematics Everything below is what sits behind that. Practical question with the units stated, because I have seen…		2	1.5k	2y
Refrigerated versus room temperature: the trade-off stated plainly — what changed since temperature excursion freeze-thaw storage cloudy or discoloured solution Closed Posting this under the heading it deserves: Refrigerated versus room temperature: the trade-off stated plainly — what changed since Everything below is what sits behind that. Practical question with the units…		2	2.7k	9mo
Light exposure: how much protection is proportionate? beyond-use date freeze-thaw cold chain cloudy or discoloured solution The question in the title: Light exposure: how much protection is proportionate? I will give what I have already checked below so nobody repeats it. A question about technique rather than about dose. I have…		2	59	3mo

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