Weed control

I wouldn't risk it in my garden. Will kill all sorts of beneficial bugs. And too much salt can contaminate soil, I think, if you use it frequently.

Yeah, not used that often and only around the edges of my allotment, to stop weed migration from the paths in between. Normally hoe or pull weeds from the plot itself. Not practical to hoe or pull out from the edges. Do shouldn't have a great impact. I think the glycosulphate would have more bad effects.

It's inert on contact with soil, and doesn't affect soil organisms, so on the specific points I mentioned, the vinegar and salt is likely to be more harmful.

But not a good idea to let it get into contact with watercourses, and there are indeed reports of potential harm to humans in sufficient quantity yes.