from Wikipedia, the free encyclopedia
Structural formula
Structural formula of 2-methylnaphthalene
Surname 2-methylnaphthalene
other names


Molecular formula C 11 H 10
Brief description

white solid with aromatic odor

External identifiers / databases
CAS number 91-57-6
EC number 202-078-3
ECHA InfoCard 100,001,890
PubChem 7055
Wikidata Q2813819
Molar mass 142.20 g mol −1
Physical state



1.006 g cm −3

Melting point

34.58 ° C

boiling point

242 ° C

  • practically insoluble in water (25 mg l −1 at 25 ° C)
  • very soluble with ethanol and ether
safety instructions
GHS labeling of hazardous substances
07 - Warning 09 - Dangerous for the environment


H and P phrases H: 302-411
P: 301 + 312 + 330
Toxicological data

1630 mg kg −1 ( LD 50ratoral )

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.


2-methylnaphthalene is a flammable white solid with an aromatic odor that is practically insoluble in water.


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 .


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

  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) .
  2. a b Entry on 2-methylnaphthalene in the Hazardous Substances Data Bank , accessed July 6, 2015.
  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).
  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 ).