Di-2-ethylhexyl phthalate (DEHP)

Di-2-ethylhexyl phthalate (DEHP) is widely utilized as a plasticizer in numerous products, primarily PVC, including medical devices, furniture materials, cosmetics, and personal care items. Since DEHP is not covalently bonded to plastics, it tends to leach out of these products after repeated use, heating, or cleaning. The extensive use of DEHP in various products leads to its release into the environment through industrial emissions and plastic waste disposal, causing pollution. DEHP can be absorbed into the body via inhalation, ingestion, and dermal contact on a daily basis, raising concerns about its safety and potential impacts on human health.

In the environment, the physico-chemical breakdown of DEHP is almost non-existent. However, biodegradation occurs readily in aerobic conditions (with a half-life of 2-4 weeks), but not in anaerobic conditions. DEHP exhibits low acute toxicity to mammals. Nonetheless, various subchronic and chronic effects have been documented. The most significant of these include impacts on the liver and energy metabolism, teratogenicity, negative effects on male reproductive organs, carcinogenicity, and effects on the immune system. The ecotoxicology of DEHP is particularly significant for aquatic communities, where findings are inconsistent: some researchers have reported harmful effects on Daphnia and fish species at current environmental concentrations, while others have found less concerning results.

Sources:

https://doi.org/10.1155/2018/1750368

https://doi.org/10.1016/0048-9697(87)90072-6