Panama and the Dominican Republic have reported finding diethylene glycol, a chemical used in engine coolants, in toothpaste from China.
The toothpaste scare is the latest involving products from China.
Earlier this year, contaminated pet food ingredients killed a number of cats and dogs in North America.
The toxic chemical, melamine, was found in wheat gluten exports from China for use in pet food, prompting a recall of at least 100 pet food brands.
The tainted wheat gluten was even thought to have made its way into livestock feed.