Introduction

6PPD-quinone, a transformation product of 6PPD, is a rapidly emerging contaminant of concern due to its exceedingly high aquatic toxicity. In the short time since 6PPD-quinone (6PPD-q) was isolated and characterized, scientists have been working to understand its prevalence and behaviors in the environment. This focus sheet below provides environmental officials with a brief overview of the current understanding of 6PPD-q sources, exposure, fate, transport, toxicity, and mitigation strategies.

Additional in-depth ITRC guidance on 6PPD and 6PPD-q will be released in summer 2024.