# How to make soap without sodium hydroxide as the starting material? [closed]

These days I'm working on a school project and I need to make soap without using sodium hydroxide.

If I really need to use it and there is no alternative, how can I obtain it from chemical reactions?

## closed as too broad by Mithoron, Todd Minehardt, airhuff, Gaurang Tandon, aventurinMar 23 '18 at 16:57

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• Use potassium hydroxide? – DHMO Sep 28 '16 at 15:07
• If you can't buy it from a chemical vendor I don't know if you'd be any better off making it yourself. Do you happen to have a lot of sodium metal laying around? If not do you have the means to make a molten salt electrolytic cell? And all this just for some soap? – ringo Sep 28 '16 at 15:17
• I think that i can make a molten dalt electrolytic cell...and it's not question of just some soap but question of something that i really want to do...i love challenges – Dou Aeza Taf Sep 28 '16 at 15:22
• Many hardware stores sell it as drain cleaner. I know ACE does. However, beware: NaOH is a nasty chemical and on top of that there is no guarantee of purity on something sold for drain cleaning, so it could contain even worse. You might be able to find higher quality lye at craft stores. It'll still melt your skin off, though. – user7652 Sep 28 '16 at 16:01
• wikihow.com/Make-Your-Own-Soap I would advise you not to try to make NaOH.It can be extremely dangerous.Use the link I gave. – user14857 Sep 29 '16 at 2:23

You can heat a small amount of baking soda ($\ce{NaHCO3}$) to ~9000C (a reddish-orange glow) to decompose to first washing soda ($\ce{Na2CO3}$) and then to sodium oxide ($\ce{Na2O}$). When it cools, slowly and carefully add the $\ce{Na2O}$ to water to get $\ce{NaOH}$ solution.
N.B. $\ce{NaOH}$ is caustic: it will damage skin and eyes, and can even dissolve a glass container.