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Yes, the dyes used in colored towels may contain harmful substances, especially some low-quality dyes. According to search results, some towels may use direct dyes containing benzidine in order to pursue bright colors and a soft touch. Although the cost of these dyes is low, they are easy to fade, and contain carcinogens, such as aromatic amines. Long term exposure to these dyes may lead to bladder cancer cancer, ureter cancer, and renal pelvis cancer, and the incubation period can reach 20 years. In addition, some inferior towels may also contain softeners containing toxic chemicals. Although these softeners can make towels feel better, they can affect their water absorption and color stability, and may have an impact on human health.

Therefore, when purchasing colored towels, one should choose a reputable brand, check the product label information, and ensure its safety and quality. At the same time, one can determine if there is an odor by smelling the towel, and high-quality colored towels usually do not have a pungent odor. If you find that the towel has a continuous fading phenomenon, it should be avoided from use, as this may be a sign of containing harmful dyes.