According to their website, glacier Gold is distributed from Canada. It is not on the latest EPA approved refrigerant list. It is hydrocarbon based, according to the Glacier Gold website. The EPA specifically prohibits hydrocarbon refrigerants for automotive use. (Obviously EPA rules only apply to USA).
"It is illegal to use hydrocarbon refrigerants as CFC or HCFC substitutes in motor vehicle air conditioning."
A long thread on r/12 and r134a some time back discussed specific detailed problems with hydrocarbon based refrigerants - it should be in the archives for those interested in searching further.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E