94133-80-9

Basic information

• Product Name: 1,7-diisopropylnaphthalene
• Synonyms: 1,7-diisopropylnaphthalene;1,7-Bis(1-methylethyl)naphthalene
• CAS NO: 94133-80-9
• Molecular Formula: C₁₆H₂₀
• Molecular Weight: 212.33
• EINECS: 302-743-9
• Mol File: 94133-80-9.mol
• Article Data: 8

Chemical Properties

• Boiling Point: 305.8°Cat760mmHg
• Flash Point: 142.5°C
• Appearance: /
• Density: 0.949g/cm³
• Vapor Pressure: 0.00145mmHg at 25°C
• Refractive Index: 1.561
• CAS DataBase Reference: 1,7-diisopropylnaphthalene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,7-diisopropylnaphthalene(94133-80-9)
• EPA Substance Registry System: 1,7-diisopropylnaphthalene(94133-80-9)

Safety Data

• Hazardous Substances Data: 94133-80-9(Hazardous Substances Data)

Usage

General Description

1,7-diisopropylnaphthalene is a chemical compound composed of a naphthalene ring with two isopropyl groups attached at the 1 and 7 positions. It is a colorless liquid with a pungent odor and is insoluble in water but soluble in organic solvents. It is primarily used as a high-temperature heat transfer fluid in industrial applications due to its thermal stability and low volatility. Additionally, it is also utilized as a plasticizer in the production of polymers and as a lubricant additive. However, it is important to handle this chemical with care as it is considered to be harmful if swallowed, inhaled, or in contact with skin and eyes.

InChI:InChI=1/C16H20/c1-11(2)14-9-8-13-6-5-7-15(12(3)4)16(13)10-14/h5-12H,1-4H3

Upstream product

• 91-20-3 naphthalene 
• 187737-37-7 propene 
• 1121-05-7 2,3-dimethylcyclopent-2-enone 
• 67-63-0 isopropyl alcohol 

Relevant articles and documents

The isopropylation of naphthalene over USY zeolite with FAU topology. The selectivities of the products

The isopropylation of naphthalene (NP) over USY zeolite (FAU06, SiO2/Al2O3 = 6) gave all eight possible diisopropylnaphthalene (DIPN) isomers: β,β- (2,6- and 2,7-), α,β- (1,3-, 1,6-, and 1,7-), and α,α- (1,4- and 1,5-). Th

The isopropylation of naphthalene with propene over H-mordenite: The catalysis at the internal and external acid sites

The isopropylation of naphthalene (NP) with propene over H-Mordenite (MOR) was studied under a wide range of reaction parameters: temperature, propene pressure, period, and NP/MOR ratio. Selective formation of 2,6-diisopropylnaphthalene (2,6-DIPN) was observed at reaction conditions, such as at low reaction temperature, under high propene pressure, and/or with high NP/MOR ratio. However, the decrease in the selectivities for 2,6-DIPN was observed at reaction conditions such as at high temperature, under low propene pressure, and/or with low NP/MOR ratio. The selectivities for 2,6-DIPN in the encapsulated products were remained high and constant under all reaction conditions. These results indicate that the selective formation of 2,6-DIPN occurs through the least bulky transition state due to the exclusion of the bulky isomers by the MOR channels. The decrease in the selectivities for 2,6-DIPN are due to the isomerization of 2,6-DIPN to 2,7-DIPN at the external acid sites, directing towards thermodynamic equilibrium of DIPN isomers.

Shape-selective synthesis of 2,6-diisopropylnaphthalene on H-mordenite catalysts

To finally dispel any doubts on the shape-selective formation of 2,6-diisopropylnaphthalene (2,6-DIPN) over H-MOR zeolites, naphthalene alkylation was carried out over high-silica H-MOR catalysts with propylene or isopropanol as an alkylating agent and with or without cyclohexane as a solvent. Isomeric composition of DIPN's, determined by one-dimensional GC analysis, was additionally confirmed with advanced two-dimensional GC × GC. Our results proved beyond any doubt shape-selective formation of 2,6-DIPN over these H-MOR catalysts from naphthalene and propylene and without cyclohexane as a solvent. The DIPN mixture contained 60-64% 2,6-DIPN, and the ratio of 2,6-DIPN/2,7-DIPN was in the range 2.5-2.8. We also showed that shape-selective formation of 2,6-DIPN over H-MOR catalyst was depressed by using isopropanol instead of propylene and in the presence of cyclohexane.