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Key Documents

H0527

Sigma-Aldrich

HEPES potassium salt

≥99.5% (titration)

Synonym(s):

Piperazineethanesulfonic acid, 4-(2-hydroxyethyl)-monopotassium salt, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid potassium salt, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid) potassium salt

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About This Item

Empirical Formula (Hill Notation):
C8H17KN2O4S
CAS Number:
Molecular Weight:
276.39
MDL number:
UNSPSC Code:
12161700
PubChem Substance ID:
NACRES:
NA.25

assay

≥99.5% (titration)

form

powder

useful pH range

6.8-8.2

pKa 

7.5

solubility

water: 0.5 g/mL, clear, colorless

SMILES string

[K+].OCCN1CCN(CC1)CCS([O-])(=O)=O

InChI

1S/C8H18N2O4S.K/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14;/h11H,1-8H2,(H,12,13,14);/q;+1/p-1

InChI key

KWURIFKZTJGMFD-UHFFFAOYSA-M

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General description

HEPES (4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid) is a widely used Good’s buffer in biochemical and biological research applications. As a zwitterionic buffer, it stabilizes the pH of the solution even when small amounts of acid or base are added.

Application

HEPES potassium salt has been used as a buffering agent in nanopore fabrication and electrolyte preparations. It has also been used as a component of cell lysis buffer.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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