a 3ml syringe for the diluent and a u100

thats fine

30mg in 3ml is 10mg/ml, so 5mg is 50 units. half the barrel, feels like a lot but its right

aim the diluent at the glass wall, not at the powder. it goes in gentler

too dilute imo

temperature of the diluent does not matter. how fast you push it in does

the jewellery scale is a good habit but calibrate it, they drift badly

anyone worked out a recon volume that puts 10mg on a round unit mark

read it at eye level

5mg in 2ml gives 2.5mg/ml, 0.25mg is 10 units. good for a starting dose

i keep a spare vial of bac water in the fridge purely so i never rush the maths

if you cannot read the mark confidently, your volume is too small. redo it at a lower concentration

if you draw up with a bigger pin and inject with a fresh one you lose a bit more to dead space

is it normal for the cake to look slightly collapsed on one side

benzyl alcohol is what makes it bacteriostatic. it is about 0.9% typically