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
EC number	202-078-3
ECHA InfoCard	100,001,890
PubChem	7055
Wikidata	Q2813819
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	practically insoluble in water (25 mg l −1 at 25 ° C); very soluble with ethanol and ether;
safety instructions
H and P phrases	H: 302-411
	P: 301 + 312 + 330
Toxicological data	1630 mg kg −1 ( LD 50 , rat , oral )
	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 ).

[GESTIS-1] ↑ ^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) .

[HSDB-2] Entry on 2-methylnaphthalene in the Hazardous Substances Data Bank , accessed July 6, 2015.

[Heinz-Gerhard_Franck,_Jürgen_W._Stadelhofer-3] 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-4] Maximilian Zander: Polycyclic aromatic hydrocarbons and fullerenes . Springer-Verlag, 2013, ISBN 978-3-322-96707-7 , p. 196 ( limited preview in Google Book search).

[5] Lyndsey Layton: US regulators lack data on health risks of most chemicals . In: The Washington Post . August 2, 2010 ( washingtonpost.com ).

[6] Bill Tomson And Paul Ziobro: Kellogg Recalls Mini-Wheats . In: Wall Street Journal . October 11, 2012 ( wsj.com ).