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Phosphate buffered saline


MDL number:



Quality Level


7.2-7.6 (1 tablet/200 mL)


water: soluble


diagnostic assay manufacturing

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General description

Phosphate-buffered saline (PBS) is a buffer solution used in biological research. It is a water-based salt solution containing sodium phosphate, sodium chloride and, in some formulations, it contains potassium chloride and potassium phosphate. The osmolality and ion concentrations of the solutions match those of the human body (isotonic) and are non-toxic to most cells.


Phosphate buffered saline has been used-
  • for the production of platinum nanoparticles (NP-Pt) hydrocolloids
  • for the washing of blood sample and SEM (scanning electron microscope) stubs prior to SEM
  • for preparing the solution of fluorescent lectin wheat germ agglutinin (WGA)
  • for the dilution of capture antibody during ELISA (enzyme linked immunosorbent assay)
  • for suspension of cell pellets during centrifugation
  • in immunoassay procedures


50, 100 tablets in poly bottle


One tablet dissolved in 200 mL of deionized water yields 0.01 M phosphate buffer, 0.0027 M potassium chloride and 0.137 M sodium chloride, pH 7.4, at 25 °C.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

  1. 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.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. Does Product P4417, Phosphate buffered saline (PBS), contain calcium or magnesium?

    No.  The complete formulation is given in the product listing.  No calcium or magnesium salts are included in the preparation.

  4. Does one tablet of Product P4417, Phosphate buffered saline (PBS), make up 1X or 10X PBS?

    When 1 tablet is reconstituted in 200 ml of water, the resulting solution is 1X PBS.

  5. Can Product P4417, Phosphate buffered saline (PBS), solution be autoclaved?

    Yes.  PBS is not harmed by standard autoclave procedures.

  6. 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.

  7. 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. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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Antibody Purification using Protein A, Protein G, or Protein L Agarose

Antibody Purification using Protein A, Protein G, or Protein L Agarose protocol is designed as a quick purification method for antibodies from mammalian sera, ascites, and cell culture supernatants. It should be noted that if the starting material is serum or ascites the final preparation will contain endogenous host IgG as well as specific antibodies. In general, the presence of this endogenous IgG should not interfere with assays using the antibodies.

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ELISA Procedures

ELISA protocols providing detailed instructions on performing indirect ELISA and Capture ELISA . Learn more about recommended products and techniques for performing both sandwich ELISA and indirect ELISA experiments.

Immunoprecipitation Procedure

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