Radon Soap?!?

The trivia for this movie says the title had to be changed in the U.S. to "Rodan" because there was already a soap in the U.S. called "Radon." I could find no evidence of a soap using that name and have a hard time believing a company would name a product used for cleaning after a radioactive element that's also classified as a health hazard!

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http://thebloodypitofhorror.blogspot.com/