Cookies disclaimer

I agree Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our website without changing the browser settings you grant us permission to store that information on your device.

Buffers - USB - Alfa Aesar

Buffers are aqueous solutions of weak acids and their conjugate bases, or weak bases and their conjugate acids. Buffers show little change in pH when small amounts of strong acids or bases are added. Buffer solutions are used in biological systems to keep pH at a nearly constant value. The pH often plays an important role in a biological process and can affect internal and external environments of tissues and cells. Buffers are often required to maintain the correct pH for proteins and oligonucleotides, as many macromolecules require precise conditions to function properly.

In biological systems an ideal buffer has the following characteristics: a pKa value between 6.0 and 8.0, high water solubility, nontoxic, limited effect on biochemical reactions, very low absorbance between 240nm and 700nm, enzymatic and hydrolytic stability, minimal changes due to temperature and concentration, limited effects due to ionic or salt composition of the solution, and limited interaction with mineral cations. We offer a complete line of biological buffers including powders and salts and also premixed buffer solutions. To review all biochemicals offered on this website check the main categories under Life Sciences which include both Affymetrix/USB and Alfa Aesar product options.

  • HEPES, 1M soln., pH 7.3, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • HEPES sodium salt, 98+% (dry basis), Ultrapure, Affymetrix/USB
  • Imidazole, 98.5+% (dry basis), Ultrapure, Affymetrix/USB
  • Imidazole, Affymetrix/USB
  • MES monohydrate, 98.5+% (dry basis), Ultrapure, Affymetrix/USB
  • MOPS, 98.5+% (dry basis), Ultrapure, Affymetrix/USB
  • PBS, 10X Solution, pH 7.4, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • TBS, 20X Solution, pH 7.4, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • TBS with Tween® (TBST), 20X Solution, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • TE Buffer, 1X Solution, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • TE Buffer, 1X Solution pH 8.0, low EDTA, Molecular Biology Grade, Affymetrix/USB
  • TE Buffer, 50X Solution, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • Tricine, 98.5+% (dry basis), Ultrapure, Affymetrix/USB
  • Triethanolamine hydrochloride, 98.5+% (dry basis), Affymetrix/USB
  • Tris, 98+%, Affymetrix/USB
  • Tris, 99.0-101.0% (dry basis), Affymetrix/USB
  • Tris-HCl, 1M soln., pH 8.0, Molecular Biology Grade, Ultrapure, Affymetrix/USB
  • Tris hydrochloride, Molecular Biology Grade, Ultrapure, Affymetrix/USB

Chemicals

Life Science

Metals & Materials

Catalysts

Analytical & Labware