Opti-MEM™ I Reduced Serum Medium, 10 x 500 mL - FAQs

View additional product information for Opti-MEM™ I Reduced Serum Medium - FAQs (31985054)

4 product FAQs found

Is there any other difference between Opti-MEM I Reduced Serum Medium and Opti-MEM I Reduced Serum Medium, no phenol red besides the presence/absence of phenol red?

The formulation of Opti-MEM I Reduced Serum Medium and that of Opti-MEM I Reduced Serum Medium, no phenol red is the same except for the presence of phenol red in the former medium.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.

Where can I find the osmolality for my lot of Opti-MEM I Reduced Serum Medium?

We do provide osmolality information on the certificate of analysis. All lots of Opti-MEM I Reduced Serum Medium will meet the osmolality specification of ≥280 to ≤320 mOsm/kg.

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Can I aliquot and freeze Opti-MEM I Reduced Serum Medium to conserve it longer? If so, for how long can it be stored?

Sorry, we don't have data to show that frozen Opti-MEM I Reduced Serum Medium has a longer shelf life. Actually, we recommend storing this medium at 2-8 degrees C in the dark. We do not recommend freezing the medium because it may precipitate.

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I noticed that Opti-MEM I Reduced Serum Medium does not contain any serum. Why do you then refer to it as "Reduced Serum Medium"?

Opti-MEM I Reduced Serum Medium is a serum-free medium. The reason why it is called “reduced-serum medium” is because you only need to supplement this medium with 1-5% FBS instead of the standard 10% FBS.

Opti-MEM I Reduced Serum Medium can be used as is (without serum) for transfection of cells. However, for long-term cell culture, you need to add serum to the medium to keep cells healthy.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.