In Lyophilization (Freeze-Drying) of Drugs & Food, thermal control is critical to product structure, sublimation efficiency, residual moisture control, and batch-to-batch consistency. Heat transfer fluids must support deep-cooling stages, stable shelf temperature control, and smooth transitions between freezing, primary drying, and secondary drying without thermal shock.E230provides a-60 to 230°Coperating range with excellent low-temperature fluidity, whileE250extends performance to-40 to 250°Cfor broader integrated heating-cooling duties in reactors, oil baths, and circulating systems. For more demanding ultra-low-temperature service,E280offers a-100 to 220°Crange,1.0 mm²/s viscosity at 40°C, and apour point below -110°C, making it highly suitable for precise freeze-drying control. Silicone-basedSi-05andSi-10further strengthen process flexibility:Si-05covers-80 to 280°Cwith4.0 mm²/s at 40°C, whileSi-10reaches-60 to 300°Cwith7.9 mm²/s at 40°Cand a210°C flash point, supporting wide-range, stable operation.Si-20further expands the silicone portfolio for tailored system matching in specialized freeze-drying utilities. Together,E230 / E250 / E280 / Si-05 / Si-10 / Si-20help manufacturers preserve sensitive drugs, foods, and biologics while improving cycle reliability, safety, and overall process efficiency.