p-Nitrosodiphenylamine

Made and used in the rubber industry (e.g., processing aids/retarders) and as an intermediate for dyes; it may also form from diphenylamine-based additives during processing or aging [1][2].

Breathing dust or vapors at work, skin contact with powders or contaminated surfaces, or contact with contaminated soil/water near manufacturing or waste sites; burning or poorly disposing of rubber can also release it [1][2].

Can irritate eyes/skin; high exposure may affect blood (reduced oxygen-carrying capacity) and liver; limited animal data suggest cancer potential, so agencies advise minimizing exposure [1][2].

Rubber and dye workers; maintenance/recycling staff handling rubber; people near production or hazardous waste sites; children through hand-to-mouth contact with contaminated dust [1][2].

Use closed systems/local exhaust at work, wear gloves and protective clothing, wash hands before eating; control dust; avoid burning rubber; follow hazardous-waste disposal rules; consider certified water filters if contamination is suspected [1][2].