MW 84.01(MW 84.01) alternate size 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 #25-035 is offered in a 7.5% solution prepared in Water for Injection (WFI)-quality water.  Refer to the addition chart included in the Technical Information section for information on proper use. MW 84.01(MW 84.01) alternate size 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 #25-035 is offered in a 7.5% solution prepared in Water for Injection (WFI)-quality water.  Refer to the addition chart included in the Technical Information section for information on proper use.