G418 Sulfate is an aminoglycoside related to Gentamycin, used as a selective agent in bacterial genetics. It is toxic to yeast, bacteria, many plant and mammalian cells, helminths and protozoans.||Synonyms:|O-2-Amino-2,7-dideoxy-D-glycero-α-D-gluco-heptopyranosyl-(1→4)-O-[3-deoxy-4-C-methyl-3-(methylamino)-β-L-arabinopyranosyl-(1→6)]-2-deoxy-D-streptamine Sulfate (1:2); Antibiotic G 418 Sulfate; G418 Sulfate||CAS No:|108321-42-2||Molecular Formula:|C20H40N4O10•2H2SO4||Molecular Weight:|692.71||Appearance:|White, crystalline powder||Solubility:|Colorless, clear, complete||Potency:|≥620ug/mg||Suggested Working Concentrations:|100-800ug/ml|Mammalian Selection: 400ug/ml|Maintenance: 200ug/ml||Absorbance (1mg/ml):|280nm: ≤0.015|570nm: ≤0.10||Water (KF):|≤12%||Specific Rotation:|+104° to +121ºC||Reconstitution:|Reconstitute with water or ethanol to a desired stock concentration. Sterilize by filtration through a 0.2um filter, aliquot and freeze at -20°C.||Storage and Stability:|Powder: Store at 4ºC. Avoid moisture uptake, as this can decrease potency. Stable for 12 months after receipt.|Stock solution: Aliquot and store at -20°C. Stable for 3-6 months -at 20°C.