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XCELTHERM® SST – Typical Properties

High operating temperature of 700°F (370°C) at low pressure; liquid phase heat transfer fluid for demanding applications. Recommended for chemical refining, oil and glycol recovery units, chemical processing, gas processing, petrochemical plants and many other applications.

Typical Properties

Key Temperatures
Maximum Bulk Fluid Operating Temperature 700°F 370°C
Maximum Film Temperature 750°F 399°C
Freezing/Melting Point -11.2°F -24°C
Flash Point (Pensky Martens)(ASTM D93)(min) 327°F 164°C
Flash Point (COC)(ASTM D92)(min) 345°F 174°C
Fire Point (minimum)(ASTM D92)(min) 374°F 190°C
Autoignition Temperature (min) 779°F 415°C
Pumpability, at 300 mm2/s (cSt) 14°F -10°C
Initial Boiling Point >610°F >320°C
Physical Properties
Appearance Water-white, clear liquid
Odor Mild
Composition Methylethylated aromatic mixture
Average Molecular Weight 252 g/mol
Density, at 25°C/77°F 7.98 lbs/gal
Specific Gravity, at 25°C/60°F (ASTM D1298)(typical and range) 0.96 0.91 – 1.10
Moisture Content (ASTM D6304)(ppm) (max) 200
Critical Temperature 908.3°F 468.8°C
Critical Pressure 217.5 psia
Critical Density 16.82 lb/ft3
Kinematic Viscosity, at 40°C/104°F (ASTM D445) 11 cSt
Kinematic Viscosity, at 100°C/212°F (ASTM D445) 2.4 cSt
Coefficient of Thermal Expansion 0.000556/°F 0.00100/°C
Heat of Vaporization, at Maximum Use Temperature 113.6 BTU/lb 264.2 kJ/kg
Total Acid Number (ASTM D664) <=0.01 mg KOH/g