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When I make soap from coconut oil and sodium hydroxide, I have a problem when I add fragrance to the system. After I mix coconut oil and sodium hydroxide, the solution becomes thicker, I add fragrance to this solution, then the system becomes solid quickly, I can not pour this soap into the...

I made a transparent liquid soap sample from fatty acid. My sample is transparent at room temperature. But when I store my sample at low temperature about 20C, it's white and opaque instead od transparent. What happened? Is it still good to use?