Can DuPont refrigerant 404A be mixed with other refrigerants?

Why can't one be mixed? It's just that DuPont's products require higher qualifications than domestic brands. In addition, some of DuPont's refrigerant products are produced by domestic manufacturers. Hehe, because some products are patented by DuPont, other manufacturers are not allowed to produce them.

Why did I say we can mix? Because we are a manufacturer of refrigerants. Moreover, we have cooperated with DuPont on some refrigerant products. A model represents a chemical substance with the same name and the same substance. Different manufacturers only have different requirements for the content of some trace impurities, all of which are PPM level.