What is the lethal amount of SN?

[Eden2k]

I have read a few posts, where SN is mentioned as a way to ctb. I really don't know much about SN, but it seems easily accessible (wonders of internet shopping)
All I want to know is what is the lethal amount needed to die?
How do I take it?
I know this is overkill, given meds I already intend to take, but I need this to work.

 

[Virgo]

There is lots of threads already.

 

[EternalSanction]

You should take between 15-20g. Don't mix softdrinks or anything with it, use water.
Further information can be found here https://sanctioned-suicide.net/threads/sn-megathread.1156/