@STATIEEIGHT said in Do you actually need a vent needle when filtering into a 5mL sterile vial?:
@ResearchCat
Ahhh - can in fact confirm that attempting to fill a pen cartridge with 2.5ml of BAC & 30mg of RETA without a vent needle will in fact eject the plug like a pop gun and spray the liquid all over one’s own fat guts.
Lol. I sacrificed a cartridge for my first time filling one using tap water so I can practice. Good thing I did. Totally forgot the vent needle and sure enough it popped out.
