foam is bad
#reconstitution 2025-12-06
Saturday21 messages5 participantstimes are UTC
Highlights from this day
- adelaide_assay — label the date too. you will not remember which vial is which by week 4 23:10
- bengaluru_bac — 20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy, anyway the meniscus thing is real. read it at eye level or you are guessing by a unit either way 23:16
- adelaide_assay — if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way 23:29
- rotterdam_recon — the jewellery scale is a good habit but calibrate it, they drift badly if the maths gives you 13.7 units, change the volume. do not try to hit 13.7 23:30
- rotterdam_recon — my rule is one concentration for everything so i never have to think about it at 7am 23:36
label the date too. you will not remember which vial is which by week 4
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anyone got a photo of what a properly dissolved vial looks like
swirl dont shake
20mg in 2ml is 10mg/ml. 1mg is 10 units, 2mg is 20 units, easy, anyway
the meniscus thing is real. read it at eye level or you are guessing by a unit either way
unrelated but how long after reconstituting before its actually dissolved
30mg in 3ml is 10mg/ml, so 5mg is 50 units. half the barrel, feels like a lot but its right
clear or bin it
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benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically
thats 5mg/ml
label the vial
if the powder is on the stopper, tap it down before you add anything. it will still dissolve either way
the jewellery scale is a good habit but calibrate it, they drift badly
if the maths gives you 13.7 units, change the volume. do not try to hit 13.7
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 = 50uis the meniscus reading actually a real source of error or am i overthinking
coming back after 5 months, has the pinned recon volume advice changed
my rule is one concentration for everything so i never have to think about it at 7am
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bac water
i was wrong about this last year: it is fine to draw cold, it just stings more going in
round numbers
i write the mg/ml on the vial with a sharpie the moment i reconstitute it
[edited]whats the smallest volume you would trust yourself to measure on a u100