4683 Dibenz[a,j]acridine Dibenz[a,j]acridine is a toxic chemical found in cigarettes. It is a polycyclic aromatic hydrocarbon (PAH). PAHs describe chemicals that are often found together in groups of two or more. PAHs are found naturally in the environment but they can also be man-made. In their purest form, PAHs are solid and range in appearance from colorless to white or pale yellow- green. PAHs are created when products like coal, oil, gas, and garbage are burned but the burning process is not complete. Although PAHs can exist in over 100 different combinations, the National Waste Minimization Program defines this group using the Toxic Release Inventory reporting category for polycyclic aromatic compounds. 224-42-0 9177 C21H13N 279.3 White powder. 2A, probably carcinogenic to humans. (L135) This is a toxic chemical found in cigarettes or generated by tobacco combustion. 2014-09-08T02:38:32Z 2026-04-17T16:06:19Z C19220 true C1=CC=C2C(C=CC3=NC4=C(C=C23)C2=CC=CC=C2C=C4)=C1 C21H13N InChI=1S/C21H13N/c1-3-7-16-14(5-1)9-11-20-18(16)13-19-17-8-4-2-6-15(17)10-12-21(19)22-20/h1-13H ANUCHZVCBDOPOX-UHFFFAOYSA-N 279.3346 279.104799421 Exogenous Solid 8822 CHEM003589 DTXSID4059758 NS00014412 13-azapentacyclo[12.8.0.0³,¹².0⁴,⁹.0¹⁷,²²]docosa-1,3(12),4,6,8,10,13,15,17,19,21-undecaene