Thermo Fisher, SR0030J, Oxoid™ Potassium Tellurite

Thermo Scientific Oxoid Potassium Tellurite is a 3.5% liquid supplement used in the preparation of selective microbiological culture media. Supplied as ten 2 mL vials, the solution introduces tellurite into compatible formulations that require inhibition of competing microorganisms or characteristic tellurite reactions. The amount added depends on the specific culture medium and its preparation instructions; the full contents of a vial should not be added indiscriminately to an unrelated formulation. Mix the solution aseptically with a prepared medium at the appropriate stage, then check the finished medium using suitable microbiological quality controls. Tellurite-containing media can be useful in selective recovery and differentiation workflows, but the supplement alone does not grow or identify bacteria. Avoid confusion with potassium tellurite powder, egg-yolk tellurite emulsion or a ready-poured agar plate. Handle tellurite reagents with suitable laboratory protection and waste controls. Keep individual vials closed and observe the stated storage and expiry conditions.