round numbers
#reconstitution 2025-10-22
Wednesday50 messages11 participantstimes are UTC
Highlights from this day
- septum_sal — do i swirl for a specific length of time or just until its clear 21:23
- closer_not_simpler — the vacuum will pull it in. let it. fighting it is how you get a face full of aerosol 22:05
- closer_not_simpler — i was wrong about this last year: it is fine to draw cold, it just stings more going in 23:07
- closer_not_simpler — what do you do with the last 10 units when you cant draw them cleanly 23:23
follow up is there any reason not to just always use 2ml
too dilute imo
bacteriostatic water for anything multi-use. sterile water has no preservative in it at all
is it normal for the cake to look slightly collapsed on one side
nobody here should be telling you a dose. we can check your arithmetic, thats a different thing
thats fine
pick the volume so your dose is a whole number of units. thats the entire trick
Reminder for septum_sal: dose day is today. Set 7 days ago.
do you let it come to room temp before drawing or draw it cold
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one unit is 0.01ml
[edited]20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy
do i swirl for a specific length of time or just until its clear
10mg vial
+ 1.0ml -> 10.0 mg/ml 0.5mg = 5u 1mg = 10u
+ 2.0ml -> 5.0 mg/ml 0.5mg = 10u 1mg = 20u
+ 2.5ml -> 4.0 mg/ml 0.5mg = 12.5u (dont)
+ 5.0ml -> 2.0 mg/ml 0.5mg = 25u 1mg = 50uit foamed. is it ruined
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Purity check: no report on file for lot B-0114. Nothing logged either way.
if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way, anyway
read it at eye level
follow up dead space in a standard insulin syringe hub is small but it is not nothing over a month
bac water
swirl dont shake
a slightly collapsed cake is cosmetic. a puddle in the bottom is not
clear or bin it
thats 5mg/ml
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you can absolutely just always use 2ml, and honestly most of us should
unrelated but gross powder mass is not net peptide. water and counterion are in that number
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the vacuum will pull it in. let it. fighting it is how you get a face full of aerosol
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lyophilised powder is far more robust than people think. it is the solution that is fragile
my vial pulled the water in on its own, is that the vacuum or did i do something
i use bac water even for a single-use vial because it stings less, which is not the reason it exists
check your maths
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15mg in 3ml is 5mg/ml. same numbers as 10 in 2, just more of it
how much do i lose to dead space with a 30G pin
coa-kp-0925.pdf
1 page · 419 KB · not retained in the public archive
why does everyone say 2ml specifically and not 1ml
write the date on
anyone worked out a recon volume that puts 2mg on a round unit mark
benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
update on the earlier thing one unit is 0.01ml. 100 units is 1ml. everything else in this channel follows from that
i swirl for about thirty seconds and then leave it. never had one fail to dissolve
took me a year to stop over-diluting. the measurement error at 4 units is worse than the convenience
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coming back after 16 months, has the pinned recon volume advice changed
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does it matter if i inject the bac water straight at the powder
anyone got a photo of what a properly dissolved vial looks like
aim the diluent at the glass wall, not at the powder. it goes in gentler, ymmv
*Medutest not the other one
Purity check: no report on file for lot A-2418. Nothing logged either way.
i was wrong about this last year: it is fine to draw cold, it just stings more going in
U-100 syringe: 1 unit = 0.01 ml
10u = 0.10 ml
25u = 0.25 ml
50u = 0.50 ml
100u = 1.00 ml
mg drawn = ml drawn x mg/mllabel the date too. you will not remember which vial is which by week 33
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bac water or sterile water for something im going into weekly for 9 weeks
what do you do with the last 10 units when you cant draw them cleanly
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can i add more bac water later to a vial ive already reconstituted