XIAMETER™ PMX-561 transformer fluid is specifically designed to increase security of transformers by reducing fire and explosion risks. This formulation provides a lower heat release rate, lower smoke generation, higher thermal stability, and higher oxidation resistance thus providing increased security and fire safety while reducing the potential of power outages. PMX-561 meets indoor and outdoor US electrical code requirements, various IEC requirements, and has a UL classification of “less Flammable”. The combination of these properties culminates to an extremely stable transformer fluid with functionality above competitors in the market.