DIBENZO(A,I)PYRENE

Химические свойства

Yellow Solid

Использование

An active metabolite from inhalation and dermal exposure to polycyclic aromatics hydrocarbons in hot mix asphalt paving workers. DBC is the most potent tumorigen that has been identified to date. Dib enzo[def,p]chrysene (DBC) is a carcinogen and should be handled with appropriate caution.

Общее описание

Yellow odorless crystals or flakes. Water insoluble.

Реакции воздуха и воды

Dust/air mixtures may ignite and explode. Insoluble in water.

Профиль реактивности

Vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as DIBENZO(A,I)PYRENE, and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.

Профиль безопасности

Confirmed carcinogen with experimental tumorigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.

Канцерогенность

Dibenzo[a,1]pyrene is a class 2B carcinogen according to the IARC, although recent data suggest that it is a 2A carcinogen. In mouse studies, it has been more potent than benzo[a]pyrene in skin, and in rat studies, it has been more potent than 7,12-dimethylbenz [a]anthracene in the mammary gland. Dibenzo[a,l]pyrene was tested for carcinogenicity in studies of single and repeated dermal application to mice, as well as several initiation–promotion studies on mouse skin; all studies gave positive results. Dibenzo[a,l] pyrene also induced oral cavity tumors when applied dermally to the tongue of hamsters and lung tumors in mice following intraperitoneal injection. In addition to lung tumors, dibenzo[a,l]pyrene induced hepatic tumors and a variety of tumors at other sites when administered intraperitoneally to newborn mice. Multiple tumor sites were also observed following intragastric application of dibenzo[a,l]pyrene in mice. Intramamillary administration to rats also yielded positive results. Furthermore, two studies on fish demonstrated that nonmammalian species are also susceptible to dibenzo[a,l]pyreneinduced tumorigenicity.The most active metabolite is the potent 11,12-dihydrodiol of dibenzo[a,1] pyrene.