C₂₀H₄₀N₄O₁₀ · 2H₂SO₄

MW 692.7              CAS #108321-42-2

Store at room temperature. 

Aminoglycoside antibiotic.
Toxic to both prokaryotic and eukaryotic cells.

Application
Use as selective agent in Transformation.
Used for selecting eukaryotic expression vectors with related resistance genes.

aka Geneticin or G-418 disulfate 
   
(G418 is also known by the trademark Geneticin®, as registered to Invitrogen Corporation.)