TBammer wrote:
Every soap starts its life with a fat or oil. The fat or oil (for human use its usually olive oil and/or coconut oil) is then combined with a strong base, like sodium hydroxide or potassium hydroxide, and saponification occurs, making a soap. Depending on the ratio, a little of the fat can be left over, which is good for bath soaps, because it keeps the skin from drying out. For cleaning you want it a little base heavy with all the fat/oil converted. Hence the MSDS showing 1% sodium hydroxide on the Murphy's
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