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K4002 Sigma

Krebs-Ringer Bicarbonate Buffer

With 1800 mg/L glucose, without calcium chloride and sodium bicarbonate, powder, suitable for cell culture



Related Categories Balanced Salt Mixtures and Solutions, Cell Culture, Classic Media and Salts, Other Salt Mixtures
Quality Level   GMP
form   powder
suitability   suitable for cell culture
storage temp.   2-8°C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

General description

Bicarbonate buffered isotonic saline containing magnesium, potassium, sodium and phosphate ions.


Formulated to contain 9.5 grams of powder per liter of medium.


Supplement with 1.26 g/L sodium bicarbonate.

Protocols & Applications

ECACC Handbook-Fundamental Techniques in Cell Culture

Price and Availability

All labs need water
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
How should Product K4002, Krebs-Ringer Bicarbonate Buffer, be dissolved?
Product No. K4002 is listed in a 10X1L package size, meaning that each of the ten containers has enough powder to make 1 Liter of KRB buffer. It can be dissolved in 1 Liter of either water or medium.
What is the formula of Product K4002, Krebs-Ringer Bicarbonate Buffer (KRB)?
The formulation for KRB can be found on the data sheet. Here is the link to that document: http://www.sigmaaldrich.com/sigma/datasheet/K4002dat.pdf
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
Product K4002 - Krebs-Ringer Bicarbonate Buffer, is without calcium chloride and sodium bicarbonate. In the reconstitution steps, you advice to add 1.26g sodium bicarbonate. Should we also add some calcium chloride? in which amount?
Product K4002 - Krebs-Ringer Bicarbonate Buffer does not contain calcium. The addition of calcium is not required for osmolarity.  If you need to have calcium, you can add calcium chloride between 1.25 to 2.5 mM.  You may want to check the osmolarity and make sure it is not too high. Kreb Henseleit Buffer has 1.25 mM calcium chloride Kreb's Buffer has 2.5 mM calcium chlorideKreb' Ringer Superfusion solution contains 2.0 mM calcium chloride. Please see the attached document for different Krebs' buffer recipes.
  What kind of solution is the A5955 - Antibiotic Antimycotic Solution (100×), Stabilized product suspended in?
A5955 - Antibiotic Antimycotic Solution (100×), Stabilized is supsended in a sodium citrate buffer solution. Source: Israel production group
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Protocols & Articles


Powdered Media Preparation Instructions

Powdered media and salt mixtures are extremely hygroscopic and should be protected from atmospheric moisture. The entire contents of each package should be used immediately after opening. Preparing m...

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