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Naphthalene's minimum odor threshold is 0.084 ppm for humans. [44] Mothballs and other products containing naphthalene have been banned within the EU since 2008. [45] [46] In China, the use of naphthalene in mothballs is forbidden. [47] Danger to human health and the common use of natural camphor are cited as reasons for the ban.
Older mothballs consisted primarily of naphthalene, but due to naphthalene's flammability, many modern mothball formulations instead use 1,4-dichlorobenzene. The latter formulation may be somewhat less flammable, although both chemicals have the same NFPA 704 rating for flammability. The latter chemical is also variously labeled as para ...
Naphtha is used to dilute heavy crude oil to reduce its viscosity and enable/facilitate transport; undiluted heavy crude cannot normally be transported by pipeline, and may also be difficult to pump onto oil tankers. Other common dilutants include natural-gas condensate and light crude. However, naphtha is a particularly efficient dilutant and ...
The terms polyaromatic hydrocarbon, [6] or polynuclear aromatic hydrocarbon [7] (abbreviated as PNA) are also used for this concept. [8] By definition, polycyclic aromatic hydrocarbons have multiple aromatic rings, precluding benzene from being considered a PAH. Some sources, such as the US EPA and CDC, consider naphthalene to be the simplest ...
Petroleum naphtha is an intermediate hydrocarbon liquid stream derived from the refining of crude oil [1] [2] [3] with CAS-no 64742-48-9. [4] It is most usually desulfurized and then catalytically reformed, which rearranges or restructures the hydrocarbon molecules in the naphtha as well as breaking some of the molecules into smaller molecules to produce a high-octane component of gasoline (or ...
Other names in common use include (+)-cis-naphthalene dihydrodiol dehydrogenase, naphthalene dihydrodiol dehydrogenase, and cis-dihydrodiol naphthalene dehydrogenase. This enzyme participates in 1- and 2-methylnaphthalene degradation and naphthalene and anthracene degradation .
The systematic name of this enzyme class is naphthalene,NADH:oxygen oxidoreductase (1,2-hydroxylating). Other names in common use include naphthalene dioxygenase , and naphthalene oxygenase . This enzyme participates in 4 metabolic pathways : 1- and 2-methylnaphthalene degradation , naphthalene and anthracene degradation , fluorene degradation ...
This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.