3-Nitrobenzanthrone
Encyclopedia
3-Nitrobenzanthrone is a chemical compound
Chemical compound
A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms that are held together...

 emitted in diesel exhaust
Diesel exhaust
Diesel exhaust is the exhaust gas of a diesel engine....

; it is a potent carcinogen
Carcinogen
A carcinogen is any substance, radionuclide, or radiation that is an agent directly involved in causing cancer. This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes...

. It produced the highest score ever reported in the Ames test
Ames test
The Ames test is a biological assay to assess the mutagenic potential of chemical compounds. A positive test indicates that the chemical is mutagenic and therefore may act as a carcinogen, since cancer is often linked to mutation. However, a number of false-positives and false-negatives are known...

, a standard measure of the cancer-causing potential of toxic chemicals, far greater than the previous known strongest 1,8-dinitropyrene which also found in diesel exhaust.
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