THERMINOL 66 HEAT TRANSFER FLUID
CAS: 54578-28-8
Category: Organic Intermediates
| Purity | Industrial Heat Transfer Fluid Grade ≥99% (manufacturer specification); High Thermal Stability Grade |
| Molecular Formula | C18H14O3 (main components are hydrogenated terphenyl derivatives) |
| Molecular Weight | Approximately 230-260 (mixture; molecular weight v |
| Appearance | Clear, pale yellow to amber liquid with low odor; thermally stable aromatic hydrocarbon heat transfer fluid. |
| Packaging | 18.9 L pails, 55 gallon drums, 200 L steel drums, 1000 L IBC containers, or bulk tanker delivery for industrial applications. |
| Testing Indicators | Appearance — Visual inspection; Density — ASTM D4052; Kinematic viscosity — ASTM D445; Flash point — ASTM D92 (Cleveland Open Cup) or ASTM D93; Pour point — ASTM D97; Distillation range — ASTM D86; Acid number — ASTM D664; Water content — ASTM D6304 Karl Fischer titration; Thermal stability — accelerated aging test; Composition analysis — GC-MS; Carbon residue — ASTM D524. |
| Storage Notes | Store in a cool, dry, and well-ventilated area away from direct sunlight, ignition sources, and strong oxidizing agents. Keep containers tightly closed when not in use. Avoid contamination with water, acids, alkalis, and other incompatible fluids. Maintain proper ventilation during storage and handling. |
| Lead Time | 10 days |
Therminol 66 (also known as Santotherm 66) is a high-temperature synthetic heat transfer fluid based on hydrogenated terphenyl compounds. It is designed for indirect heating and cooling systems requiring excellent thermal stability. Applications include chemical processing equipment, polymer manufacturing, asphalt processing, solar thermal systems, heat exchangers, reactors, and industrial thermal oil circulation systems operating at high temperatures.