Sodium bicarbonate
Sodium bicarbonate is used as part of a buffering system commonly used to maintain physiological pH 7.2 - 7.4 in a culture environment. Bicarbonate is a weak buffer with that makes maintaining a pH range of 7.2 - 7.6 somewhat difficult, but it is non-toxic, and is a nutrient source. Sodium Bicarbonate is offered in solutions prepared in Water for Injection (WFI) quality water.
- Complete Certificate of Analysis available for each lot, along with full formulation information
Technical Advantage: Product manufactured under industry-leading standards for low endotoxin content and superior results.
HEPES
HEPES (N-2-hydroxyethylpiperazine-N’-2-ethanesulphonic acid) provides an alternative to the use of bicarbonate for buffering because it does not require elevated levels of CO2. Unlike the low pKa of bicarbonate, HEPES has a pKa of 7.66 making it a much stronger buffer in the pH 7.2-7.6 range than bicarbonate buffer. Potential disadvantages of HEPES include toxicity over 100 mM and lack of nutritive value to the cell.
- Complete Certificate of Analysis available for each production lot, along with full formulation information
Technical Advantage: Product manufactured under industry leading standards for low endotoxin content and superior results.