Synthetic refrigeration oil based on synthetic hydrocarbons for NH3 applications. For low oil carry-over and high thermal stability. RENISO UltraCool 68 has a better lifetime compared to mineral oil based refrigeration oils. RENISO UltraCool 68 shows an excellent low temperature flowability which allows the use even at evaporation temperatures below - 45 °C. RENISO UltraCool 68 fulfills and exceeds DIN 51503 KAA (non-miscible with ammonia).;RENISO UltraCool 68 is NSF H2 registered.