Dowtherm A is the preferred product for use in Solar-CSP thermal projects for its thermal stability and operability upto 400°C. Dowtherm A is manufactured with 99.99% high-purity Diphenyl Oxide, with the final product containing 0 PPM corrosive chlorides.

Dow is the leading heat transfer fluid supplier for Solar-CSP thermal projects worldwide .

Dowtherm A is a eutectic mixture of Diphenyl Oxide and Biphenyl, which is extremely thermally stable. This product can be used in the liquid or vapour phases between 15°C and 400°C and has an atmospheric boiling point of 257°C.