Why is the actual cell count in a PromoCell vial sometimes higher than the 500,000 cells stated on the website?
PromoCell guarantees more than 500,000 viable cells per vial.
To reliably meet this guarantee, more than 500,000 cells must be frozen at the time of cryopreservation. This is necessary because the post‑thaw viability cannot be determined at the moment of freezing.
Additional factors
For technical and organizational reasons, the initial cell number may vary between different lots. As a result:
To reliably meet this guarantee, more than 500,000 cells must be frozen at the time of cryopreservation. This is necessary because the post‑thaw viability cannot be determined at the moment of freezing.
Additional factors
For technical and organizational reasons, the initial cell number may vary between different lots. As a result:
- Two lots with the same post‑thaw viability may still contain different absolute cell numbers.
- The actual number of cells in a vial may therefore be significantly higher than 500,000.
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