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storage

Page 6 of 30 · 701 questions tagged storage.

701 questions · sorted by votes · page 6 of 30

31 votes 5 answers32k views
Does a phase-change pack hold a mazdutide shipment for twenty-one days in transit?

Concretely: mazdutide · twenty-one days. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
international-shipping
international-shipping

Cross-border movement of research material: transit lanes and their thermal profiles, tracked versus untracked, declaration accuracy, and what…

471 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
mazdutide
mazdutide

A GLP-1 and glucagon receptor dual agonist developed primarily in China, with a distinct dose range and a fast-moving publication record.…

237 questions
asked by hana_petrikova 10k · 16 months ago
31 votes 5 answers32k views
What happens to survodutide after four weeks at minus 80 °C in solution?

Conditions: survodutide · four weeks · minus 80 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted the…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by tadhg_o_riordan 7.7k · 10 months ago
31 votes 5 answers30k views
Do I need to let a refrigerated vial come to room temperature before drawing?

I have the same lot stored correctly as a comparator, if a side-by-side test would help. I have done this once and I suspect I got away with it rather than got it…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
reconstitution
reconstitution

Taking a lyophilised vial to a solution of known concentration: choice of diluent, volume selection, how to add liquid without shearing the cake,…

313 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

96 questions
asked by claudia_ferrante 22k · 12 months ago
31 votes 2 answers28k views
Does retatrutide adsorb measurably to the vial wall at 20 mg/mL?

What I am working with: retatrutide · 20 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far,…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

476 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
retatrutide
retatrutide

An investigational GLP-1, GIP and glucagon receptor tri-agonist, studied in the TRIUMPH programme. Not approved anywhere. Use this tag for…

251 questions
asked by tare_and_weigh 12k · 16 months ago
31 votes 5 answers23k views
Is minus 80 °C an acceptable storage condition for lyophilised survodutide?

The specifics, since they change the answer: minus 80 °C · survodutide. I would like to know whether this claim survives contact with evidence. If the answer is…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
survodutide
survodutide

A GLP-1 and glucagon receptor dual agonist with a substantial published MASH dataset. Use this tag for its hepatic endpoints, its dose ladder, and…

225 questions
asked by rhian_prydderch 23k · 10 months ago
31 votes5 answers23k views
What happens to ecnoglutide after four weeks at minus 80 °C in solution?

Conditions: ecnoglutide · four weeks · minus 80 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted the…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
ecnoglutide
ecnoglutide

A long-acting GLP-1 receptor agonist with a cAMP-biased signalling profile. A niche tag, mostly used for mechanism questions about biased agonism…

223 questions
asked by plate_count_9k 78k · 2.4 years ago
31 votes 5 answers21k views
Is 4 °C an acceptable storage condition for lyophilised mazdutide?

Setup, so nobody has to ask: 4 °C · mazdutide. This has the shape of a fact but I cannot find its origin. What I found instead were three secondary sources all citing…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
mazdutide
mazdutide

A GLP-1 and glucagon receptor dual agonist developed primarily in China, with a distinct dose range and a fast-moving publication record.…

237 questions
asked by area_percent 9.9k · 17 months ago
31 votes3 answers9k views
What is the actual thermal profile of a Guangzhou to Europe lane in August?

I have continuous temperature data for the period in question, which is unusual and I would like to use it. I can parse the result. I am less sure what it licenses me…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
international-shipping
international-shipping

Cross-border movement of research material: transit lanes and their thermal profiles, tracked versus untracked, declaration accuracy, and what…

471 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
asked by harriet_lonsdale 35k · 9 months ago
31 votes0 answers8.6k views
How many freeze-thaw cycles will ecnoglutide at 2 mg/mL tolerate?

The case in front of me: ecnoglutide · 2 mg/mL. I am trying to do this correctly the first time rather than learn it by getting it wrong. I have already made one…

freeze-thaw
freeze-thaw

What repeated freezing does to a peptide in solution: ice-crystal shear at the growing front, freeze-concentration of solutes, pH shifts as buffer…

57 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
ecnoglutide
ecnoglutide

A long-acting GLP-1 receptor agonist with a cAMP-biased signalling profile. A niche tag, mostly used for mechanism questions about biased agonism…

223 questions
asked by kofi_mensah 18k · 10 months ago
30 votes 5 answers54k views
Does cagrilintide adsorb measurably to the vial wall at 1 mg/mL?

Numbers first: cagrilintide · 1 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

476 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
amylin
amylin

Amylin and its analogues, most prominently cagrilintide, as a satiety mechanism orthogonal to incretin signalling. Includes the pharmacology of…

237 questions
asked by bounty_hunter_q 15k · 2.0 years ago
30 votes5 answers34k views
How do I plan for a mazdutide supply interruption without stockpiling badly?

I have continuous temperature data for the period in question, which is unusual and I would like to use it. This is a planning question. I know what my options are; I…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
discontinuation
discontinuation

Stopping treatment: tapering versus abrupt cessation, what the trial withdrawal arms measured, clinically driven stops, and the practical planning…

21 questions
cost-analysis
cost-analysis

Cost arithmetic done honestly: cost per milligram after dead-space loss, list versus net price, comparing a multi-dose vial to a fixed-dose pen,…

260 questions
mazdutide
mazdutide

A GLP-1 and glucagon receptor dual agonist developed primarily in China, with a distinct dose range and a fast-moving publication record.…

237 questions
asked by tandem_gradient 61k · 21 months ago
30 votes 5 answers30k views
Does mazdutide adsorb measurably to the vial wall at 1 mg/mL?

Numbers first: mazdutide · 1 mg/mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
content-assay
content-assay

Quantified content: how many milligrams of peptide are actually in the vial, measured against a calibrated reference standard. A separate test…

476 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
mazdutide
mazdutide

A GLP-1 and glucagon receptor dual agonist developed primarily in China, with a distinct dose range and a fast-moving publication record.…

237 questions
asked by Dr_Wren_Halliday 19k · 2.3 years ago
30 votes5 answers29k views
Is 25 °C an acceptable storage condition for lyophilised tirzepatide?

The case in front of me: 25 °C · tirzepatide. I want to know whether there is evidence behind this or only repetition. I have checked the obvious registries and…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
tirzepatide
tirzepatide

A dual GIP and GLP-1 receptor agonist. Questions here cover the SURPASS and SURMOUNT programmes, the practical differences from a pure GLP-1…

370 questions
asked by p_mkhize 58k · 13 months ago
30 votes5 answers28k views
Does racemisation dominate for retatrutide held at 4 °C?

Details up front: racemisation · retatrutide · 4 °C. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have a boring…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
retatrutide
retatrutide

An investigational GLP-1, GIP and glucagon receptor tri-agonist, studied in the TRIUMPH programme. Not approved anywhere. Use this tag for…

251 questions
asked by RP_C18 105k · 15 months ago
30 votes 5 answers28k views
What is the thermal exposure on a Wuxi to Ireland lane in summer?

Concretely: Wuxi · Ireland. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to disagree, which is…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
international-shipping
international-shipping

Cross-border movement of research material: transit lanes and their thermal profiles, tracked versus untracked, declaration accuracy, and what…

471 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
asked by Dr_Priya_Raghunathan 49k · 10 months ago
30 votes5 answers27k views
Is 30 °C an acceptable storage condition for lyophilised retatrutide?

What I have: 30 °C · retatrutide. I am asking for verification rather than opinion, ideally with something I can read myself. It is possible the evidence exists and I…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
retatrutide
retatrutide

An investigational GLP-1, GIP and glucagon receptor tri-agonist, studied in the TRIUMPH programme. Not approved anywhere. Use this tag for…

251 questions
asked by aine_mulcahy 28k · 2.1 years ago
30 votes5 answers22k views
Does light exposure matter for a peptide in an amber vial?

I have continuous temperature data for the period in question, which is unusual and I would like to use it. I suspect the usual explanation for this is wrong, or at…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
asked by hana_petrikova 10k · 2.2 years ago
30 votes 5 answers18k views
How long does orforglipron stay within specification at room temperature once reconstituted?

For reference: orforglipron · room temperature. This is a procedural question rather than a theoretical one, and I would like the procedure rather than the theory.…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
orforglipron
orforglipron

A non-peptide, orally bioavailable small-molecule GLP-1 receptor agonist studied in the ATTAIN programme. It is not a peptide, which changes…

219 questions
asked by ines_delacruz 16k · 11 months ago
30 votes5 answers18k views
Why does oxidation accelerate at 4 °C rather than proceeding linearly?

Concretely: oxidation · 4 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just academically, because it…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
asked by pascal_thibault 11k · 18 months ago
30 votes 5 answers17k views
Why does fibrillation accelerate at 37 °C rather than proceeding linearly?

For reference: fibrillation · 37 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review articles that come…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
asked by lukas_sedlacek 16k · 21 months ago
30 votes 5 answers16k views
What happens to oral semaglutide after three weeks at minus 20 °C in solution?

The specifics, since they change the answer: oral semaglutide · three weeks · minus 20 °C. I understand the observation; what I do not understand is the mechanism…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
oral-glp1
oral-glp1

Oral routes for GLP-1 receptor agonism: peptide formulations rescued by absorption enhancers such as SNAC, and true small molecules that need no…

219 questions
asked by meniscus_film 32k · 10 months ago
29 votes 5 answers57k views
What is the thermal exposure on a Chengdu to Canada lane in summer?

The case in front of me: Chengdu · Canada. I have read the primary source rather than the summary, which has left me with more questions. I understand the headline. I…

cold-chain
cold-chain

Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…

578 questions
international-shipping
international-shipping

Cross-border movement of research material: transit lanes and their thermal profiles, tracked versus untracked, declaration accuracy, and what…

471 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
asked by retest_please 9.7k · 23 months ago
29 votes 5 answers54k views
Is 40 °C an acceptable storage condition for lyophilised a GLP-1 receptor agonist?

Stated plainly: 40 °C · a GLP-1 receptor agonist. This has the shape of a fact but I cannot find its origin. What I found instead were three secondary sources all…

storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
shelf-life
shelf-life

How long a preparation remains within specification: labelled expiry for a sealed lyophilised vial, beyond-use dating after reconstitution, and…

327 questions
asked by net_peptide 12k · 2.2 years ago
29 votes 5 answers52k views
Why does oxidation accelerate at 30 °C rather than proceeding linearly?

The case in front of me: oxidation · 30 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just academically,…

peptide-stability
peptide-stability

The chemistry of peptide degradation: deamidation, oxidation, hydrolysis, aggregation and fibrillation, and how temperature, pH, ionic strength,…

908 questions
storage
storage

Storage conditions and their evidence base: minus twenty degrees for powder, refrigerated for solution, protection from light, and what the…

701 questions
hplc
hplc

Reverse-phase high-performance liquid chromatography, the workhorse purity method. Column chemistry, mobile-phase choice, gradient slope,…

503 questions
asked by day_seven_trough 6.7k · 2.2 years ago