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A recent study has uncovered a potential link between the use of a new type of chemical called Dinch in plastic food packaging and lower birth weights, raising concerns about the safety of these materials. Dinch, a synthetic alternative to phthalate plasticizers, is widely used in soft food packaging in the US and EU, as well as in children's toys, medical devices, textiles, flooring, and other consumer goods.

Despite industry claims that Dinch is a "high safety" and non-toxic substitute, the NYU Langone Health analysis of federal health data suggests that it may not be as safe as previously believed.

The study, which examined data from over 6,600 pregnancies collected as part of the NIH's Environmental influences on Child Health Outcomes (Echo) Program, found that higher levels of Dinch exposure were associated with a 27-gram reduction in newborn birth weight. This reduction could lead to a range of health issues later in life, including heart disease, learning difficulties, and obesity. The authors of the study emphasized the need for proper safety testing of chemicals before they are widely used in consumer products.

Researchers noted that Dinch, also known as 1,2-cyclohexane dicarboxylic acid diisononyl ester, is used to enhance the flexibility and durability of plastic. It is found in common kitchen items such as cling film and plastic wine corks. The study found that up to 70% of women had Dinch in their urine, and the risk of having a child classified as "small for gestational age" increased with higher Dinch levels. Hispanic mothers and those with lower education levels were more likely to have children affected by Dinch.

The findings highlight the ongoing issue of "regrettable substitution" in the chemical industry, where one dangerous chemical is replaced by another with similar health risks. While regulators have taken action against toxic phthalates like DEHP, the use of Dinch has increased in recent years. German chemical giant BASF is among the major producers of Dinch, with global production volume rising from 25,000 tons in 2002 to 400,000 tons in 2024.

The study's authors are concerned about the lack of research on the health impacts of Dinch and its potential to migrate from food packaging into food. The Food Packaging Forum, a Switzerland-based organization, is currently conducting health research on DINCH. The NYU findings underscore the need for stronger oversight of chemicals used in food packaging and other household products, including a requirement for testing before they are introduced to the market.

In the meantime, women can protect themselves and their children by opting for plastic-free products, such as clothing and toys, and choosing food packaged in glass materials or stored in glass or wooden containers.