I was wondering about that as well. I think I should be looking for Pharmaceutical or food grade sodium hydroxide. I found it on Amazon but still looking around before I order.
https://www.amazon.com/dp/B001EDBEZM/?tag=pfamazon01-20
lol... don't worry, Ill test it on my skin some where before I stick it up my nose. Even then Ill still be extremely careful with a tiny amount before I stick it up my nose which is more sensitive than my skin.
The PH test strips might be the way to go. I'm in no hurry so I think I will...
I wouldn't care too much about shelf life as I would only make it at the time I needed it and then throw it out a couple of days later after I was convinced that I didn't need it anymore. I mean it took all of 5 minutes to make it besides the sitting in the fridge part.
So I wonder maybe its...
Its a zinc nasal gel to fight colds. You can't buy it anymore but I found directions on you tube to make it.
but he says to leave out the sodium hydroxide because he thinks its dangerous. I guess maybe he doesn't know how much to put into it.
I made the solution in his video and it came out...
If you had a solution of the following
zinc
benzalkonium chloride
glycerin
hydroxyethylcellulose
purified water
sodium chloride
sodium hydroxide
what would be the purpose of the sodium hydroxide and would the solution be fine without it?
What would you use for a safer substitute?