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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:
82207-62-3
Molecular Weight:
276.39
MDL number:
MFCD00043438
UNSPSC Code:
12161700
PubChem Substance ID:
24895405
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 Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

H0527-250G:
H0527-1KG:
H0527-VAR:
H0527-BULK:
H0527-25G:
H0527-100G:

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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HEPES

Complexation of copper by zwitterionic aminosulfonic (good) buffers
Mash HE, et al.
Analytical Chemistry (2003)
Use of a solid-state nanopore for profiling the transferrin receptor protein and distinguishing between transferrin receptor and its ligand protein
O'Donohue M, et al.
Electrophoresis (2023)
Equilibrium studies, synthesis and characterisation of zwitterionic buffer (HEPES and HEPPS) dimethyltin (IV) complexes
Mohamed M
Main Group Chemistry, 63-84 (2007)
Determining the location of an Arabidopsis chloroplast protein using in vitro import followed by fractionation and alkaline extraction
Chu CC and Li HM
Methods in Molecular Biology (2011)
Jugal Saharia et al.
Electrophoresis, 43(5-6), 785-792 (2022-01-13)
Electrolyte chemistry plays an important role in the transport properties of analytes through nanopores. Here, we report the translocation properties of the protein human serum transferrin (hSTf) in asymmetric LiCl salt concentrations with either positive (Ctrans /Ccis < 1) or
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