The hazardous and corrosive chemical pourer is manufactured of fluoropolymer PTFE. All pouring surfaces are totally inert. Even the neck-sealing ring is encapsulated in PTFE. The design allows direct and controlled pouring, due to the incorporated breather vent. The pourer comes in four sizes to fit standard reagent bottles with neck sizes of GL45, 38, 32 and 30. The PTFE closure ensures contaminant free contents when not in use. Assembly includes cap.