Hey Jox, good thread. It might be a good idea to move this over to the safety section.
1. I'm unaware if there is a "standard" ratio to use when it comes to making a lye solution. I typically shoot for around 1g/10ml so it would be around 10g of lye for every 100ml of water. You can make it stronger or weaker but I find that it's usually a good starting point.
2. The amount of lye needed depends on how much vinegar was used. More vinegar = more acidic = more lye needed. The beautiful thing about harmalas is their beautiful color changes. It's hard to it wrong when you're working with a clear container.
3. As far as reactions go, I'm unaware of all of the possibilities with other chemicals but for our use, the key points to keep in mind are:
- Never pour water into lye. Always pour lye into the water slowly. Adding the water to lye can cause a violent reaction, especially when aluminum is involved.
- Never use anything aluminum.
Nexus Chemists : If there are any other reactions to be aware of or if my statements here are off base, please let us know.And general safety guidelines when working with lye are:
- Be careful to never splash or spill the solution. Lye solution is highly corrosive and will eat away at just about anything aside from glass and certain types of plastic.
- When handling lye, always were gloves, goggles and long sleeves. Lye can cause blindness and severe burns. Try to keep as much of your body covered as possible in case of spills or splashes.
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ALWAYS keep some vinegar close by to neutralize any possible spills.
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ALWAYS keep some fresh water close by in case any does get into your eyes. Always know where this water is so if you can't see, you'll still be able to find it. Flush eyes out continually for at least 10 minutes and seek medical attention. If asked what you were doing, say "Making soap".
- Do not breathe in the fumes while the lye is reacting. Try to keep a well ventilated area while working with lye. The fumes are odorless but can't possibly be good for you.
- Goes without saying but I'll say it anyways, always keep lye and lye solutions out of reach of children and animals. This stuff is far too dangerous for a kids level of curiosity and carelessness.
- More information available at
http://www.ccohs.ca/osha...droxide/working_sod.htmlThanks for asking this as it's pretty important and Welcome to the Nexus.

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