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Persistent, Mobile, Toxic: The Effects of Chemical Warning Labels on Public Risk Perception
Ellise Suffill1, Nina Vaupotič1,2, Jule Schlösser1
1Environmental Psychology Group, University of Vienna, Vienna 1010, Austria.
Environmental Science & Technology Letters
|April 20, 2026
Summary
Public perception of chemical risks, like persistent, mobile, and toxic (PMT) substances, is crucial. Warnings about toxicity, persistence, and mobility significantly influence consumer concern and policy support, especially when combined.
Area of Science:
- Environmental Science
- Risk Communication
- Consumer Psychology
Background:
- Persistent, mobile, and toxic (PMT) chemicals, including per- and polyfluoroalkyl substances (PFAS), present significant environmental and health concerns.
- Public perception of chemical risks influences regulatory actions and consumer behavior.
- Limited research exists on how the public perceives chemical properties like persistence and mobility, individually or combined with toxicity.
Purpose of the Study:
- To investigate public perception of chemical properties (persistence, mobility, toxicity) and their combinations.
- To assess the impact of these properties on risk perception, affect, concern, and policy support for everyday products.
- To compare responses to labels indicating single properties versus combined properties (PMT).
Main Methods:
- 328 participants evaluated everyday products (dental care, household cleaner) with different chemical warning labels.
- Labels indicated the presence of persistent (P), mobile (M), and toxic (T) chemicals, alone or in combination (PM, PT, MT, PMT), versus a control.
- Participants rated products on affect, concern, and policy support.
Main Results:
- Toxicity warnings elicited the strongest risk response when presented alone.
- The effect of toxicity warnings was amplified for high body-contact products (dental care).
- Combined PMT warnings triggered the most significant risk response, showing a non-additive effect.
Conclusions:
- Public risk perception is sensitive to warnings about chemical properties beyond just toxicity.
- Communicating diverse chemical properties (persistence, mobility, toxicity) can effectively alter public behavior and support for stricter regulations.
- Understanding public perception of PMT chemicals is vital for effective risk management and policy development.
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