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Naphthalene
Naphthalene is made from crude oil or coal tar. It is an organic compound with formula C10H8. It is the simplest polycyclic aromatic hydrocarbon, and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromatic hydrocarbon, naphthalene’s structure consists of a fused pair of benzene rings.
Naphthalene is used as an insecticide and pest repellent and as a fumigant , naphthalene vapors build up to levels toxic to both the adult and larval forms of many moths that attack textiles. Other fumigant uses of naphthalene include use in soil as a fumigant pesticide, in attic spaces to repel insects and animals such as opossums, and in museum storage-drawers and cupboards to protect the contents from attack by insect pests. The other largest use of naphthalene is the production of phthalic anhydride, which is an intermediate used to make plasticizers for polyvinyl chloride, and to make alkyd resin polymers used in paints and varnishes
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Molten naphthalene provides an excellent solubilizing medium for poorly soluble aromatic compounds. In many cases it is more efficient than other high-boiling solvents. Other uses includes using as a fuel additives for the automotive industry, and as corrosion inhibitor in the petroleum sector. Naphthalene is found in a variety of consumer products including paint solvents, mothballs and driveway sealant.
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