TH-dimer
Names
Other names
Tetrahydromethylcyclopentadiene dimer; Tetrahydrodimethyldicyclopentadiene; THDMDCP; RJ-4; RJ4
Identifiers
ChemSpider
EC Number
InChI=1S/C12H20/c1-7-8(2)12-6-11(7)9-4-3-5-10(9)12/h7-12H,3-6H2,1-2H3
Key: XGTOHMPHWPGRTK-UHFFFAOYSA-N
Properties
C 12 H 20
Molar mass
164.292 g·mol−1
Density
0.915 g/cm3
Hazards
Flash point
60 °C (140 °F; 333 K)
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
TH-dimer , also called tetrahydromethylcyclopentadiene dimer[ 1] or RJ-4, is a liquid rocket propellant used in missiles and jet engines. For example, TH-dimer is used in the turbofan engine of the Tomahawk cruise missile . It is also a component of the jet fuel JP-9 .
The fuel is non-volatile, so it is safe to use on ships or submarines. It has a high flash point minimum of 60 °C (140 °F).[ 2]
Chemically, TH-dimer is a mixture of isomeric saturated hydrocarbons derived from hydrogenation of the dimer of methylcyclopentadiene .[ 3]
References