What is methylnaphthalene used for?

1-Methylnaphthalene and 2-methylnaphthalene are used to make other chemicals such as dyes, and resins. 2-Methylnaphthalene is also used to make vitamin K. All three chemicals are present in cigarette smoke, wood smoke, tar, asphalt, and at some hazardous waste sites.

Is 2-methylnaphthalene a PAH?

2-Methylnaphthalene (CASRN 91-57-6) is a polycyclic aromatic hydrocarbon (PAH), consisting of two-fused aromatic rings with a methyl group attached on one of the rings at the number two carbon (Figure 1).

Is 1-methylnaphthalene a PAH?

1-Methylnaphthalene is a polycyclic aromatic hydrocarbon (PAH).

What is the cetane number of 2 methyl naphthalene?

2-methyl naphthalene, 91-57-6.

Is Naphthalene a molecule?

A naphthalene molecule can be viewed as the fusion of a pair of benzene rings. (In organic chemistry, rings are fused if they share two or more atoms.) As such, naphthalene is classified as a benzenoid polycyclic aromatic hydrocarbon (PAH).

Is Naphthalene a liquid?

OVERVIEW. Naphthalene (NAF-thuh-leen) is a white crystalline volatile solid with a characteristic odor often associated with mothballs. The compound sublimes (turns from a solid to a gas) slowly at room temperature, producing a vapor that is highly combustible.

Is acenaphthene soluble in water?

Acenaphthene appears as white needles. Melting point 93.6°C. Soluble in hot alcohol. Denser than water and insoluble in water.

Is acenaphthene polar or nonpolar?

Initial searches for acenaphthene (C12H10), acenaphthylene (C12H8), and fluorene (C13H10) were guided by quantum chemical calculations performed at the B3LYP/cc-pVTZ level of theory. All three molecules exhibit b-type rotational spectra and are calculated to be moderately polar, with dipole moments of 0.3Y0.

What is functional group of naphthalene?

Naphthalene, the active component of mothballs, contains two fused benzene rings. Benzo[a]pyrene, an aromatic hydrocarbon produced in small amounts by the combustion of organic substances, contains five fused benzene rings. Like several other polycyclic aromatic hydrocarbons, it is carcinogenic.

What has the highest cetane no?

Pure cetane is assigned the highest cetane number, i.e. 100 (most ignitable) and pure 1-methylnaphthalene the lowest cetane number 0 (least ignitable).

What is octane and cetane number?

– Gasoline has a octane number 93 – 97. • cetane number denotes the ignition delay time (the start of the injection of diesel fuel to the onset of the auto-ignition). The cetane number ranks the fuels; the higher the cetane number the faster the auto-ignition.

Which is an anaerobic 2-methylnaphthalene degradation pathway?

An anaerobic 2-methylnaphthalene degradation pathway is presented elsewhere. A soil isolate, Pseudomonas putida CSV86 is able to grow using 1-and 2-Methylnaphthalene as the sole sources of carbon and energy ( Mahajan et al., 1994 ).

How are methyl substituted naphthalenes harmful to the environment?

Methyl substituted naphthalenes raise great environmental and human health concern since they have been shown to be one of the most toxic components in the water soluble fraction of crude and fuel oils. This page describes the microbial degradation of 2-methylnaphthalene under aerobic conditions.

What is the half life of 2-methylnaphthalene?

The amount in blood at 3 hours was 0.75 ug and that for the lungs was 0.69 ug; at 6 hours, the blood had a concentration of 0.71 ug and the lung had 0.76 ug. The half-life of 2-methylnaphthalene in the blood was 10.4 hours. The decay of naphthalene in the other tissues examined was described as biphasic.

When was 2-methylnaphthalene discovered in North Carolina?

94.3 °F (NTP, 1992) National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina. 34.4 °C 34.6 °C