It is an azeotropic mixture of 50% R-125 and 50% R-143a.
The specific appearance of "Дод" is a classic example of —the garbled text that occurs when software fails to correctly identify a character set.
While the exact string "Дод" doesn't correspond to a specific popular movie or story, it is frequently associated with technical data or industrial topics in various online contexts: 1. The "R-507" Refrigerant Story
In Russian Cyrillic, the characters for "Dod" or similar terms might be rendered this way if a webpage's encoding is broken.