It can take a while.
I turned grey and fingers/lips blue in a matter of 30 min to an hour and I had way less than the Stan or PPH amount.
I had a quick taste/swig of the full mixture of about 20-25g to 50ml of water.
it had sat all day to in a plastic water bottle, after being mixed and poured into the bottle earlier the same day.
Even after all day that it sat and that tiny amount, it was still a potent solution enough to drop my O2 down to 80%.,
I was sort of found, when I couldnt walk and fell down to floor (wobbly knees).
If no one had been home and no treatment, I believe I would hVe been dead or permanently damaged of not. EMT were shocked I was talking a stood up to get into their wheely chat to get out door to ambulance. They refused to let me stay and be (or not be).
But I saw what I needed to see. For next time,if there is one.