21564-91-0

Basic information

• Product Name: 1,5-DIMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE
• Synonyms: 1,5-Dimethyltetraline;Naphthalene, 1,2,3,4-tetrahydro-1,5-dimethyl-;1,5-DIMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE;1,5-DIMETHYLTETRALIN;1,2,3,4-tetrahydro-1,5-dimethylnaphthalene;Einecs 244-446-6
• CAS NO: 21564-91-0
• Molecular Formula: C₁₂H₁₆
• Molecular Weight: 160.26
• EINECS: 244-446-6
• Product Categories: Arenes;Building Blocks;Organic Building Blocks
• Mol File: 21564-91-0.mol
• Article Data: 12

Chemical Properties

• Melting Point: -17.94°C (estimate)
• Boiling Point: 245-249 °C(lit.)
• Flash Point: 223 °F
• Appearance: /
• Density: 0.956 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.0564mmHg at 25°C
• Refractive Index: n20/D 1.539(lit.)
• CAS DataBase Reference: 1,5-DIMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,5-DIMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE(21564-91-0)
• EPA Substance Registry System: 1,5-DIMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE(21564-91-0)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• Hazardous Substances Data: 21564-91-0(Hazardous Substances Data)

Usage

Uses

1,5-Dimethyltetralin (1,5-DMT) may be employed as a precursor for the preparation of 2,6-naphthalenedicarboxylic acid.

Definition

ChEBI: A member of the class of tetralins that is tetralin which is substituted by a methyl group at position 1 and at position 5,

Synthesis Reference(s)

Canadian Journal of Chemistry, 47, p. 2837, 1969 DOI: 10.1139/v69-470

General Description

1,5-Dimethyltetralin can be prepared from 5-(o-tolyl)-pent-1-ene and 5-(o-tolyl)-pent-2-ene.

InChI:InChI=1/C12H16/c1-9-5-3-8-12-10(2)6-4-7-11(9)12/h3,5,8,10H,4,6-7H2,1-2H3

Upstream product

• 571-61-9 1,5-dimethylnaphthalene 
• 42946-77-0 5-ortho-tolylpentene 
• 529-20-4 2-methylphenyl aldehyde 
• 73178-44-6 1-(2-methylphenyl)-1-pentanol 
• 868748-02-1 3-methyl-4-(p-tolyl)butanal 

Downstream Products

• 575-43-9 1,6-dimethylnaphthalene 
• 581-42-0 2.6-dimethylnaphthalene 
• 571-61-9 1,5-dimethylnaphthalene 

Relevant articles and documents

Cyclization-Rearrangement of Alkylstyrenes. 2. Applications to the Synthesis of Some Naphthalene and Phenanthrene Derivatives

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Nickel-tungsten sulfide aromatic hydrocarbon hydrogenation catalysts synthesized in situ in a hydrocarbon medium

Nickel-tungsten sulfide nanocatalysts for the hydrogenation of aromatic hydrocarbons (HCs) have been prepared by the in situ decomposition of a nickel thiotungstate precursor in a HC feedstock using 1-butyl-1-methylpiperidinium nickel thiotungstate complex [BMPip]2Ni[WS4]2 as the precursor. The in situ synthesized particles have been characterized by X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. It has been shown that the resulting Ni-W-S particles are nanoplates associated in multilayer agglomerates; the average length of the Ni-W-S particles is 6 nm; the average number of layers in the multilayer packaging is three. The catalytic activity of the synthesized catalysts has been studied in the hydrogenation of model mixtures of mono- and bicyclic aromatic HCs and in the conversion of dibenzothiophene in a batch reactor at a temperature of 350°C and a hydrogen pressure of 5.0 MPa. It has been shown that the studied catalysts can be used for the hydrofining of light cycle oil.

Preparation method of 1,5-dimethyltetralin using dealuminated zeolite beta catalyst

The present invention relates to a method for preparing 1,5-dimethyltetralin using a dealuminated zeolite beta catalyst. The preparation method of 1,5-dimethyltetralin according to the present invention has the effects of not only showing high conversion and high selectivity of 1,5-dimethyltetralin but also of suppressing deactivation of a zeolite beta catalyst so as to enhance the catalyst life, by using the dealuminated zeolite beta catalyst.