Tags · Practice

cloudy or discoloured solution

Visual inspection findings and what they mean.

34 topics 6 solved Synonyms: visual-inspection Group: Practice

34 topics · page 1 of 2

Topic	Participants	Replies	Views	Activity
Coming back to: Solubility limits and what a cloudy solution is telling you Pharmacology › Formulation chemistry sterile water cloudy or discoloured solution storage counter-ion content On the subject in the title: Solubility limits and what a cloudy solution is telling you Working notes rather than a conclusion. A documentation question rather than an analytical one. I have a certificate in…	+38	43	29k	13h
Solubility limits and what a cloudy solution is telling you Pharmacology › Formulation chemistry cloudy or discoloured solution storage counter-ion content Solubility limits and what a cloudy solution is telling you — setting out what I have, and where I think it stops being reliable. A documentation question rather than an analytical one. I have a certificate…	+11	15	34k	20h
Coming back to: Storing in the door of the fridge is worse than you think Practice › Storage & stability 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
What published stability data actually covers, and what it does not Practice › Storage & stability 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
Coming back to: Light exposure: how much protection is proportionate? Practice › Storage & stability 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
Preservatives: function, testing, and limits — one year on Pharmacology › Formulation chemistry sterile water cloudy or discoloured solution storage bacteriostatic water Wiki On the subject in the title: Preservatives: function, testing, and limits — one year on Working notes rather than a conclusion. Working through the identity arithmetic and I would like it checked. tirzepatide…	+28	32	437	8d
[2026 update] Does a peptide degrade silently, with no visual change? Practice › Storage & stability 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
Second pass at: Temperature logging at home: what is worth the effort Practice › Storage & stability 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
[2026 update] Storing lyophilised material long term: what governs the shelf life Practice › Storage & stability 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
Follow-up: A parcel that arrived warm: a decision process, not a verdict Practice › Storage & stability 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
Revisiting: Mean kinetic temperature explained without the mathematics Practice › Storage & stability 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: Lyophilisation and why the cake looks the way it does Pharmacology › Formulation chemistry bacteriostatic water cloudy or discoloured solution sterile water Solved Lyophilisation and why the cake looks the way it does Writing it up because I had to work it out twice and would rather nobody else did. I would like to understand what this number means before I repeat it…	+10	14	11k	3mo
Light exposure: how much protection is proportionate? Practice › Storage & stability 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
[2026 update] Buffers, pH and why a formulation is a formulation Pharmacology › Formulation chemistry counter-ion content storage bacteriostatic water cloudy or discoloured solution Posting this under the heading it deserves: Buffers, pH and why a formulation is a formulation Everything below is what sits behind that. Working through the identity arithmetic and I would like it checked.…		2	773	3mo
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Practice › Storage & stability 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
Storing in the door of the fridge is worse than you think Practice › Storage & stability 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
Adsorption to container surfaces and to plastics Pharmacology › Formulation chemistry cloudy or discoloured solution counter-ion content sterile water bacteriostatic water On the subject in the title: Adsorption to container surfaces and to plastics Working notes rather than a conclusion. A documentation question rather than an analytical one. I have a certificate in front of…	+13	17	4.3k	5mo
Lyophilisation and why the cake looks the way it does Pharmacology › Formulation chemistry sterile water bacteriostatic water storage cloudy or discoloured solution Posting this under the heading it deserves: Lyophilisation and why the cake looks the way it does Everything below is what sits behind that. I would like to understand what this number means before I repeat…	+33	37	60k	6mo
What published stability data actually covers, and what it does not — what changed since Practice › Storage & stability 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
Temperature logging at home: what is worth the effort Practice › Storage & stability 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
Freeze-thaw and why one cycle is not the same as five Practice › Storage & stability 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 — what changed since Practice › Storage & stability 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
Power cut for eleven hours: how I assessed it afterwards Practice › Storage & stability 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
Revisiting: Power cut for eleven hours: how I assessed it afterwards Practice › Storage & stability 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
Second pass at: Isotonicity and what happens when you get it wrong Pharmacology › Formulation chemistry counter-ion content storage bacteriostatic water sterile water Closed Second pass at: Isotonicity and what happens when you get it wrong — setting out what I have, and where I think it stops being reliable. Working through the identity arithmetic and I would like it checked.…	+1	5	2.6k	11mo
Excipient function in a licensed injectable Pharmacology › Formulation chemistry bacteriostatic water cloudy or discoloured solution sterile water Solved Wiki Closed Excipient function in a licensed injectable Writing it up because I had to work it out twice and would rather nobody else did. Posting the method first, because I know what the first three replies will…	+3	7	36k	14mo
Preservatives: function, testing, and limits Pharmacology › Formulation chemistry counter-ion content storage bacteriostatic water sterile water Preservatives: function, testing, and limits — setting out what I have, and where I think it stops being reliable. Working through the identity arithmetic and I would like it checked. tirzepatide has a…	+23	27	3.7k	16mo
Coming back to: Adsorption to container surfaces and to plastics Pharmacology › Formulation chemistry bacteriostatic water counter-ion content storage sterile water Adsorption to container surfaces and to plastics — setting out what I have, and where I think it stops being reliable. Posting the method first, because I know what the first three replies will otherwise be.…		2	459	17mo
About the Formulation chemistry category Pharmacology › Formulation chemistry bacteriostatic water sterile water cloudy or discoloured solution Pinned Wiki Buffers, pH, isotonicity, preservatives, lyophilisation and excipient function. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is recorded with its author and…		4	4.5k	18mo
Transporting a vial for a weekend away Practice › Storage & stability 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

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