thats the vacuum
[edited]#reconstitution 2025-07-28
Monday34 messages6 participantstimes are UTC
Highlights from this day
- rotate_the_site — genuine question is the meniscus reading actually a real source of error or am i overthinking 18:35
- mood_dip_mari — 10mg in 2ml is 5mg/ml. so 0.5mg is 0.1ml which is 10 units on a u100 19:22
- mood_dip_mari — i write the mg/ml on the vial with a sharpie the moment i reconstitute it 19:25
- rotate_the_site — what do you do with the last 5 units when you cant draw them cleanly 10mg in 2ml is 5mg/ml. so 0.5mg is 0.1ml which is 10 units on a u100 20:27
- lean_mass_lex — unrelated but 5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose the meniscus thing is real. read it at eye level or you are guessing by a unit… 20:51
lyophilised powder is far more robust than people think. it is the solution that is fragile
i keep a spare vial of bac water in the fridge purely so i never rush the maths
my vial pulled the water in on its own, is that the vacuum or did i do something
do you draw up with the same pin you inject with
clear or bin it
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right so my rule is one concentration for everything so i never have to think about it at 7am
genuine question is the meniscus reading actually a real source of error or am i overthinking
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gross powder mass is not net peptide. water and counterion are in that number
give it 2 minutes at room temperature before you decide it has not dissolved
im getting bubbles in the barrel every single time, what am i doing wrong
write the date on
if you cannot read the mark confidently, your volume is too small. redo it at a lower concentration
i use bac water even for a single-use vial because it stings less, which is not the reason it exists
if the maths gives you 13.7 units, change the volume. do not try to hit 13.7
a 3ml syringe for the diluent and a u100 for the dose is the setup most people here end up with
[edited]10mg in 2ml is 5mg/ml. so 0.5mg is 0.1ml which is 10 units on a u100
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i write the mg/ml on the vial with a sharpie the moment i reconstitute it
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anyone worked out a recon volume that puts 2.4mg on a round unit mark
read it at eye level
the powder is stuck to the stopper, do i care
i have never once regretted using a rounder number and a slightly bigger volume
a slightly collapsed cake is cosmetic. a puddle in the bottom is not, ask me again in a month
swirl dont shake
it should be completely clear with no floaters. cloudy means stop
what do you do with the last 5 units when you cant draw them cleanly
10mg in 2ml is 5mg/ml. so 0.5mg is 0.1ml which is 10 units on a u100
it foamed. is it ruined
unrelated but 5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose
the meniscus thing is real. read it at eye level or you are guessing by a unit either way
weigh it first
dead space
the last few units are a real loss. i accept it rather than tilting the vial and drawing air
does temperature of the bac water matter at all
i was wrong about this last year: it is fine to draw cold, it just stings more going in
coming back to this you can absolutely just always use 2ml, and honestly most of us should, ask me again in a month
label the vial