Officials have declared 4NP a “contaminant of emerging concern” or CEC, which refers to any pollutants in the environment that are not well understood by humans and are thus unregulated. What products contain 4NP? 4NP is often used in pulp and paper processing, as well as in the production of soap, detergents, and textiles. However, it can also leak into the ocean via sewage treatment plants and industrial runoff. Once it enters the sea, smaller organisms ingest it, gradually making its way up the food chain until it reaches the top predators like killer whales. https://www.naturalblaze.com/2023/01/toxic-toilet-paper-and-forever-chemicals-discovered-inside-endangered-killer-whales.html