Jan 1, 2019 · Naphthalene, the simplest bicyclic aromatic ring, is conventionally derived from coal tar. It is a white solid material with strong pungent odour. Naphthalene was first discovered by Scottish chemist, Alexzander garden in 1819. Michael Faraday first reported its molecular formula (C 10 H 8) in 1826 [1]. Conventionally, naphthalene is ...

Naphthalene (91-20-3) is a component of crude oil and is found in petroleum-derived fuels and consumer products. The most common use of naphthalene in consumer products is in the production of mothballs. Naphthalene ingestion can result in acute as well as delayed toxicity. The primary target organs of toxicity are the blood and the eyes.

Feb 3, 2011 · Naphthalene conversion (naphthalene hydrogenated to tetralin, octalins and decalins) varied from 4 to 96%. This corresponds to a naphthalene hydrogenation rate of 1-24×10 3 mol/(kg cat s). An additional experiment carried out with very low catalyst loading led to a low naphthalene conversion and only tetralin as product.

Jan 1, 2025 · Naphthalene is a two fused benzene ring polycyclic aromatic hydrocarbon. Naphthalene was initially registered with the U.S. Department of Agriculture (USDA) as a pesticide in 1948. The United States Environmental Protection Agency (EPA) issued a registration standard for naphthalene in 1981, and the substance was reregistered by the agency in 2008.

The toxic nature of naphthalene is believed to be due to oxidative stress since naphthalene is metabolised to 1,2-naphthalene oxide which depletes GSH pools by S-conjugation (Wells et al., 1989). The lens is not able to directly form naphthalene 1,2-oxide from naphthalene, and naphthalene itself is incapable of cataract induction in cultured ...

Mar 1, 2024 · Naphthalene, the most abundant polycyclic aromatic hydrocarbon in the atmosphere, significantly influences OH consumption and secondary organic aerosol (SOA) formation. Naphthoquinone (NQ) is a significant contributor to ring-retaining SOA from naphthalene degradation, impacting the redox properties and toxicity of ambient particles.

Consistent results were obtained through enzyme activity analysis. Under naphthalene stress, the C12DO enzyme activity in ND6 was significantly higher compared to C23DO. It is speculated that the degradation of naphthalene by strain ND6 involves catechol pathway, with the ortho-pathway (mediated by C12DO) being more effective than the meta-pathway.

Jan 1, 2013 · Naphthalene is also an undesirable product in the fuel oil for the same reasons above mentioned. To valorise this waste, it is imperative to recovery the fuel oil in order to reuse it eventually. In this context, the work focuses mainly on the extraction of naphthalene from fuel oil with the mixture DMSO-methanol- water.

Apr 1, 2024 · Naphthalene, the smallest and the most abundant member in the PAHs family (Arey et al., 1987, 1989), is commonly Arey et al., 1987, 1989 used as a moth repellent as well as a precursor in manufacturing phthalic anhydride for naphthalene-derived resins synthesis and precursors for several dyestuffs (Preuss et al., 2003; Sharma and Lee, 2015).

Jan 1, 2005 · Naphthalene has a number of significant emission sources, including combustion of fossil fuels and wood, evaporation from naphthalene-containing products, and refining operations (ATSDR, 2004). Naphthalene is a natural constituent of coal tar and crude oil, and is used in manufacturing dyes, plastics, leather tanning agents, carbonyls used in ...