DOWCAL™ 200 heat transfer fluid is a high-quality inhibited propylene glycol–based solution from Dow Chemical for a range of thermal transfer applications. DOWCAL™ 200 is low in acute oral toxicity and contains a specially formulated inhibitor package that helps prevent the corrosion of materials common in HVAC construction, ground source heat pumps, solar panels, food and beverage processing, and other systems with metals prone to corrosion.