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Is pH of soap 4 or 9?

Updated: 9/25/2023
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9y ago

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True soap (fats reacted with lye) is slightly alkaline. A pH of 4 is acid, a pH of 9 is alkaline.

You can probably figure it out now.

However many "soaps" on the market are really detergents, which tend to be closer to neutral (pH 7).

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9y ago
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Q: Is pH of soap 4 or 9?
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