2-methylnaphthalene
Structural formula | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
General | ||||||||||||||||
Surname | 2-methylnaphthalene | |||||||||||||||
other names |
β-methylnaphthalene |
|||||||||||||||
Molecular formula | C 11 H 10 | |||||||||||||||
Brief description |
white solid with aromatic odor |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 142.20 g mol −1 | |||||||||||||||
Physical state |
firmly |
|||||||||||||||
density |
1.006 g cm −3 |
|||||||||||||||
Melting point |
34.58 ° C |
|||||||||||||||
boiling point |
242 ° C |
|||||||||||||||
solubility |
|
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
2-methylnaphthalene is a chemical compound from the group of aromatic polycyclic hydrocarbons .
Extraction and presentation
2-methylnaphthalene can be obtained by isomerizing 1-methylnaphthalene or from a methylnaphthalene fraction of coal tar that contains 1.5% 2-methylnaphthalene. Around 1500 tons are produced worldwide each year.
properties
2-methylnaphthalene is a flammable white solid with an aromatic odor that is practically insoluble in water.
use
2-methylnaphthalene is used as a mixture with 1-methylnaphthalene as a solvent and heat transfer oil. It also serves as a starting material for the production of menadione and naphthalene-2,6-dicarboxylic acid .
Trivia
In August 2010, Kellogg’s recalled 28 million packets of muesli from stores because some of them were contaminated with 2-methylnaphthalene. In 2012, Kellogg's had to recall nearly 3 million cereals again.
Individual evidence
- ↑ a b c d e f g h i j Entry on 2-methylnaphthalene in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ↑ a b Entry on 2-methylnaphthalene in the Hazardous Substances Data Bank , accessed July 6, 2015.
- ^ A b Heinz-Gerhard Franck, Jürgen W. Stadelhofer: Industrial Aromatic Chemistry Raw Materials Processes Products . Springer-Verlag, 1987, ISBN 978-3-662-07875-4 , pp. 348 ( limited preview in Google Book search).
- ↑ Maximilian Zander: Polycyclic aromatic hydrocarbons and fullerenes . Springer-Verlag, 2013, ISBN 978-3-322-96707-7 , p. 196 ( limited preview in Google Book search).
- ↑ Lyndsey Layton: US regulators lack data on health risks of most chemicals . In: The Washington Post . August 2, 2010 ( washingtonpost.com ).
- ^ Bill Tomson And Paul Ziobro: Kellogg Recalls Mini-Wheats . In: Wall Street Journal . October 11, 2012 ( wsj.com ).