573-98-8

Basic information

• Product Name: 1,2-DIMETHYLNAPHTHALENE
• Synonyms: 1,2-DIMETHYLNAPHTHALENE 96+%;1,2-DiMethylnaphthalene 95%;1,2-DIMETHYLNAPHTHALENE;Naphthalene, 1,2-dimethyl-;1,2-DIMETHYLNAPHTHALENE OEKANAL, 250 MG;1,2-Dimethylnaphthalene,98%
• CAS NO: 573-98-8
• Molecular Formula: C₁₂H₁₂
• Molecular Weight: 156.22
• EINECS: 209-364-7
• Product Categories: Naphthalene derivatives;NaphthalenesChemical Class;PAHsMore...Close...;Alpha Sort;Analytical Standards;AromaticsVolatiles/ Semivolatiles;Chemical Class;D;DAlphabetic;DID - DINAnalytical Standards;Hydrocarbons;NeatsAnalytical Standards;Arenes;Building Blocks;Organic Building Blocks
• Mol File: 573-98-8.mol
• Article Data: 22

Chemical Properties

• Melting Point: −2-−1 °C(lit.)
• Boiling Point: 266-267 °C(lit.)
• Flash Point: >230 °F
• Appearance: /
• Density: 1.013 g/mL at 25 °C(lit.)
• Refractive Index: n20/D 1.615(lit.)
• Water Solubility: Difficult to mix in water.
• BRN: 2039376
• CAS DataBase Reference: 1,2-DIMETHYLNAPHTHALENE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-DIMETHYLNAPHTHALENE(573-98-8)
• EPA Substance Registry System: 1,2-DIMETHYLNAPHTHALENE(573-98-8)

Safety Data

• Safety Statements: 23-24/25
• WGK Germany: 3
• Hazardous Substances Data: 573-98-8(Hazardous Substances Data)

Usage

Uses

1,2-Dimethylnaphthalene is suitable reagent used to investigate the secondary organic aerosol (SOA) production via gas-phase photooxidation.

Definition

ChEBI: A dimethylnaphthalene carrying methyl groups at positions 1 and 2.

General Description

1,2-Dimethylnaphthalene belongs to the family of polycyclic aromatic hydrocarbons (PAHs), which are of industrial relevance. PAHs are considered as common environmental contaminants and can adversely affect human health.

InChI:InChI=1/C12H12/c1-9-7-8-11-5-3-4-6-12(11)10(9)2/h3-8H,1-2H3

Upstream product

• 35699-44-6 2-methyl-1-naphthaldehyde 
• 1985-59-7 1,1-dimethyltetralin 
• 118-75-2 chloranil 
• 71-43-2 benzene 
• 87031-39-8 1-Amino-3,4-dimethylnaphthalene 
• 90-12-0 1-Methylnaphthalene 
• 7732-18-5 water 
• 7647-01-0 hydrogenchloride 
• 64-19-7 acetic acid 
• 85268-71-9 1,1,2-trimethyl-1,2,3,4-tetrahydronaphthalene 
• 1016970-32-3 4-methyl-4-phenylpent-1-yn-3-yl acetate 
• 13556-55-3 3,3-dimethyl-1,2-dihydronaphthalene 
• 64-17-5 ethanol 
• 6626-23-9 1-chloromethyl-2-methyl-naphthalene 

Downstream Products

• 61172-29-0 1-bromomethyl-2-methylnaphthalene 
• 1706-15-6 α-methyl-1-naphthalenometanol 
• 16020-34-1 1-Hydroxy-3,4-dimethylnaphthalene 
• 35699-45-7 1-Methyl-2-naphthaldehyde 
• 35699-44-6 2-methyl-1-naphthaldehyde 
• 102606-06-4 Acetic acid 2-methyl-naphthalen-1-ylmethyl ester 
• 1575-96-8 2-methyl-1-naphthoic acid 
• 74661-65-7 1,11-Dimethyl-9,10-dioxa-tricyclo[6.2.2.0^2,7]dodeca-2⁽⁷⁾,3,5,11-tetraene 
• 126558-71-2 (2-Methyl-naphthalen-1-yl)-methyl-hydroperoxide 
• 20027-77-4 5,6-dimethyl-1,2,3,4-tetrahydronaphthalene 
• 36736-25-1 1,2-dimethyl-1,2,3,4-tetrahydronaphthalene 
• 215-26-9 1,2:3,4:5,6-tribenzanthracene 
• 85982-10-1 1,2-Bis(triphenylphosphoniomethyl)naphthalin-dibromid 
• 91-20-3 naphthalene 

Relevant articles and documents

Sterically hindered N-heterocyclic carbene/palladium(ii) catalyzed Suzuki-Miyaura coupling of nitrobenzenes

Palladium-catalyzed denitrative Suzuki coupling of nitroarenes using 2-aryl-5-(2,4,6-triisopropylphenyl)-2,3-imidazolylidene[1,5-a]pyridines as the ligands is described. The key to success is the use of the NHC ligands which show strong donating ability and suitable steric hindrance allowing the successful oxidative addition of Ar-NO2 bonds. Both aromatic and aliphatic boronic acids are tolerated, and a variety of biphenyls and alkylarenes were obtained in good to excellent yields.

Selective synthesis of 2,6-triad dimethylnaphthalene isomers by disproportionation of 2-methylnaphthalene over mesoporous MCM-41

2,6-Dimethylnaphthalene (2,6-DMN) is one of the crucial intermediates for the synthesis of polybutylenenaphthalate and polyethylene naphthalate (PEN). The complex synthesis procedure and the high cost of 2,6-DMN production significantly reduce the commercialisation of PEN even though PEN demonstrates superior properties compared with polyethylene terephthalate. 2,6-DMN can be produced by methylation of 2-methylnaphthalene (2-MN) and/or naphthalene, disproportionation of 2-MN, and/or isomerisation of dimethylnaphthalenes (DMNs). In this study, synthesis of 2,6-triad DMN isomers consisting of 2,6-DMN, 1,6-DMN, and 1,5-DMN have been investigated with the disproportionation of 2-MN over unmodified and Zr-modified mesoporous MCM-41 zeolite catalysts. In contrast to other DMN isomers, both 1,5-DMN and 1,6-DMN can be effectively isomerised to be profitable 2,6-DMN. The disproportionation of 2-MN experiments were carried out in a catalytic fixed-bed reactor in the presence of 1?g of catalyst at a temperature range of 350–500?°C and weight hourly space velocity between 1 to 3?h?1. The results demonstrated that mesoporous MCM-41 zeolite catalyst has a selective pore shape for 2,6-triad DMN isomers, which may allow a decrease in the production cost of 2,6-DMN. Additionally, 2,6-DMN was successfully synthesised by the disproportionation of 2-MN over MCM-41 zeolite catalyst. Furthermore, both the conversion of 2-MN and the selectivity of 2,6-DMN were considerably enhanced by the Zr impregnation on MCM-41.

Methylation of naphthalene on MTW-type zeolites. Influence of template origin and substitution of Al by Ga

Two templates, methyltriethylammonium bromide (MTEA) and tetraethylammonium bromide (TEA) were used to synthesize aluminosilicate ZSM-12 zeolites. Additionally, zeolites isomorphously substituted (partially or totally) by gallium were prepared with MTEA.