I keep seeing the obvious but I know it's wrong.
My brother has a company and has received 5litres of hand sanitizer.
It is 2000ml softener mixed with 3000ml alcohol. It's 60% alcohol.
I'm trying to add alcohol (95%) to make it up to 70% volume as that's what he ordered but couldn't get.
How much alcohol should I add?
I thought it was around 500ml but my logical brain says no as the amount of softener is too much in the overall product.
What do you think? It's hurting my head!