C‑9 aromatic hydrocarbon solvent (CAS No. 64742‑95‑6, C₉H₁₂ average) is a colorless to dark yellow petroleum-derived solvent, boiling between ~160–175 °C, and containing >90% C₉ aromatic isomers like trimethylbenzenes and ethyltoluenes. It’s water‑insoluble, flammable, and widely used across adhesives, inks, paints, and sealants