Dry rock cooking with muriatic/hydrocloric acid vs sulphuric acid

Joe Batt

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I am cleaning up some old dry rocks and I was going to use muriatic acid. The slight problem I have is that I don't live in the US and I can't find any, the closest I have got was hydrochloric acid in a 25g drum.....a little much I feel ;)

I have however found Ph Redux that says it is sulphuric acid. Is there any reason I cant use that instead? If its OK are there any extra precautions you have to take other than the standard gloves, goggles, mask and open area?
 
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Onedeadbob

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I would ask Randy in the chemistry forum; not sure about how / if any sulfur would end up bound in the rock?

Some alternatives would be bleach and / or vinegar (not at the same time). I have read that bleach will remove the organics while any of the acidic solutions will help remove bound phosphates.
 

Water Dog

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Regular table vinegar (3%) will work in place of muriatic acid. It’s a lot safer as well. I would go 50% vinegar and 50% water for about an hour. The first time I did it, I went 3 hours and I felt that it ate too much of the rock. Prior to the 50/50 table vinegar bath, I did a bleach bath as well.
 

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