1,2,4-Trimethylbenzene

Made during petroleum refining; present in gasoline/aviation fuel, solvents, oil-based paints and thinners; released from vehicle exhaust, industrial processes, and spills [1][3].

Breathing air during fueling or near traffic; using paints, solvents, or adhesives indoors; workplaces like painting, printing, auto repair, or fuel handling; less often from contaminated water; skin contact with fuels/solvents [1][2][3].

Short-term exposure can cause eye, nose, and throat irritation, cough, headache, dizziness, and nausea; very high levels may cause poor coordination. Long-term effects are less certain; cancer risk is not well established for this chemical [1][2][3].

Workers handling fuels/solvents, painters, and auto technicians; people in poorly ventilated spaces or attached garages; those with asthma/COPD; children and pregnant people may be more sensitive to irritants [1][2].

Choose water-based/low-VOC products; use and store solvents/fuels with good ventilation, sealed, and outside living areas; avoid idling and refuel carefully; fix fuel leaks; at work, use gloves/respiratory protection and follow safety guidance [1][2][3].