What we know about DEHTP and other substitutes

What the study says

Plain-English summary

The authors reviewed environmental monitoring, biomonitoring, laboratory, animal, and epidemiologic evidence for DEHTP and other substituted benzene carboxylic-acid plasticizers.

Use and human exposure appear to be increasing as these chemicals replace regulated ortho-phthalates, while the evidence base remains much thinner than it is for older phthalates.

Animal, zebrafish, and cell studies raise reproductive and endocrine questions, but limited human evidence does not establish a consumer health effect or a ranking among finished products.

Why it matters

Context

A phthalate-free claim answers one ingredient question; it does not establish that every replacement plasticizer has been tested more thoroughly or found safer.

What it cannot prove

Limitations

This was a broad literature review rather than a reported systematic review or meta-analysis. Much of the toxicity evidence comes from animals, fish, or cells, and the limited human evidence cannot support a product ranking, individual risk estimate, or consumer health claim.

Proportionate next steps

Practical actions

• Look for the specific material or plasticizer identity instead of treating phthalate-free as a complete safety claim.
• Prefer transparent manufacturers that provide product-specific testing or standards, especially for heat and food contact.
• Support source reduction and comparative testing without assuming an unstudied substitute is either harmless or dangerous.

Read it yourself

Original source

Prevalence and reproductive toxicity of di-2-ethylhexyl terephthalate (DEHTP) and other substituted benzene carboxylic acid derivatives used as phthalate alternatives

DOI: 10.1016/j.envpol.2026.128573