6PPD is the the primary anti-degradant inside of tires and prevents premature weathering and degradation of the rubber from sunlight, oxygen, and ozone damage. 6PPD-quinone (6PPD-q) is a transformation product of 6PPD and now recognized as a global contaminant.
The 6PPD & 6PPD-quinone (6PPD, 2024) guidance document provides information about 6PPD and 6PPD-q to support future policies and regulations related to these chemicals. It introduces 6PPD and 6PPD-q and summarizes current knowledge about their effects, toxicity, physical and chemical properties, occurrence, fate, and transport in the environment. The guidance describes approaches for measuring, mapping, and modeling these chemicals, along with mitigation measures, solutions, policies, regulations, and laws. It also identifies key information gaps and research needs. In addition, there is a companion focus sheet, What We Know: 6PPD and 6PPD-quinone, that provides a high-level overview of the topic.
Topic(s): 6PPD, Contaminants of Emerging Concern, Stormwater, Tire Degradant
