Products > Optimization Screens > StockOptions Buffer Kits > StockOptions PIPES Buffer Kit

StockOptions PIPES Buffer Kit


  • Focused, titrated buffer stocks for crystal screening, optimization, & production


  • pH 6.1 to 7.5 (15 reagents)
  • 0.1 pH unit increments
  • 1.0 M concentrated stocks


StockOptions Buffer kits are reagent toolboxes for the macromolecular crystal grower. Stock-Options reagent kits offer precisely formulated, high quality crystallization grade reagent stocks in convenient, cost-effective kits. The chemicals utilized in StockOptions kits are the same crystallization grade, ultra-high purity chemicals utilized in the Hampton Research kits. StockOptions reagents are carefully formulated under strict quality standards to ensure reliable performance and lot-to-lot consistency.

Preformulated stocks remove calculation, measurement, and formulation errors. No more second guessing how the reagent was formulated, what specific chemical was used, when it was made, or how to precisely reproduce that reagent when it is gone and more reagent is required for additional setups.

Each 1.0 M PIPES solution has been titrated using NaOH.
HR2-257 contains fifteen unique 10 milliliter volumes of 1.0 M PIPES buffer solution titrated to the indicated pH using NaOH.

Synonyms: 1,4-Piperazinediethanesulfonic acid, Piperazine-1,4-bis(2-ethanesulfonic acid), Piperazine-N,N′-bis(2-ethanesulfonic acid)
Mr 302.37
CAS Number [5625-37-6]
EC Number 227-057-6
Beilstein Registry 817713
Purity ≥ 99%
pKa 6.8

Useful pH range of PIPES buffer 6.1-7.5




StockOptions™ PIPES


pH 6.1 to 7.5 in 0.1 pH unit increments



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1. The expression, purification and crystallization of the epsilon subunit of the F1 portion of the ATPase of Escherichia coli. Codd, R; Cox, GB; Guss, JM; Solomon, RG; Webb, D. J Mol Biol 228, 306- 309, 1992.

2. Increasing the size of microcrystals by fine sampling of pH limits. A. McPherson. J. Appl. Cryst. (1995). 28, 362-365.

3. Microscale Fluorescent Thermal Stability Assay for Membrane Proteins Structure, Volume 16, Issue 3, 11 March 2008, Pages 351-359 Alexander I. Alexandrov, Mauro Mileni, Ellen Y.T. Chien, Michael A. Hanson, Raymond C. Stevens