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RDD035

Sigma-Aldrich

HEPES sodium salt

≥99.5% (titration), free-flowing, Redi-Dri™

Synonym(s):

HEPES Sodium, HEPES hemisodium salt, Sodium HEPES, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid sodium salt, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid) sodium salt

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About This Item

Empirical Formula (Hill Notation):
C8H17N2NaO4S
CAS Number:
75277-39-3
Molecular Weight:
260.29
MDL number:
MFCD00036463
UNSPSC Code:
12161700
NACRES:
NA.25

product line

Redi-Dri™

Quality Level

100

Assay

≥99.5% (titration)

quality

free-flowing

useful pH range

6.8-8.2

pKa (25 °C)

7.5

application(s)

diagnostic assay manufacturing

SMILES string

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

InChI

1S/C8H18N2O4S.Na/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

RDZTWEVXRGYCFV-UHFFFAOYSA-M

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General description

HEPES sodium salt is essential to prepare HEPES buffer that is commonly used for cell culture and protein applications. It is useful for maintaining homeostasis when working with cells outside of the incubator by balancing CO2. HEPES buffering capacity exceeds most buffers, with a pKa of 7.5, making it optimal for maintaining pH in biological systems. In solution, it is non-toxic, zwitterion with a physiological buffering range of pH 6.8 - 8.2. It has a low metal binding capacity and is safe to use in research for metal-binding proteins.

Application

HEPES sodium salt can be used:
  • as a protein precipitation buffer
  • in cell culture media
  • as a binding buffer

Features and Benefits

  • Redi-Dri™ eliminates clumping for hygroscopic chemicals
  • powder remains free-flowing and easy to use
  • Safer to handle and weigh out for standard use in lab
  • Eliminates clumps, maintains product moisture, quality, and characteristics

Physical form

Lyophilized, spray dried, or crystallized material.

Other Notes

For additional information on our range of Biochemicals, please complete this form.

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
SLCF3906

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Nishant Mehta et al.
Cell reports, 28(10), 2509-2516 (2019-09-05)
V-domain immunoglobulin (Ig) suppressor of T cell activation (VISTA) is an immune checkpoint protein that inhibits the T cell response against cancer. Similar to PD-1 and CTLA-4, a blockade of VISTA promotes tumor clearance by the immune system. Here, we report a
Rakesh Kumar Pathak et al.
The Analyst, 137(17), 4069-4075 (2012-07-24)
A highly fluorescent Zn(2+) complex of the triazole linked salicyl-imino-thiophenyl conjugate of calix[4]arene, [ZnL] has been demonstrated to be a chemo-sensing ensemble for the recognition of His and Cys among the naturally occurring amino acids in HEPES buffer milieu. The
Qing Dai et al.
Analytical chemistry, 83(17), 6559-6564 (2011-08-02)
A ratiometric fluorescence sensor based on pyrene was designed for selective detection of heparin in HEPES (N-(2-hydroxyethyl)piperazine-N'-ethanesulfonic acid) buffer and serum sample. Pyrene and long-chain alkanes were linked through bisquaternary functionality in the sensor which could interact with heparin via
J R Eidet et al.
Experimental eye research, 94(1), 109-116 (2011-12-14)
The use of amniotic membrane (AM) represents one of the major developments in ocular surface reconstruction. However, in a study on patients with primary pterygium, transplantation of AM with ex vivo expanded human conjunctival epithelial cells (HCjE) promoted earlier epithelialization
Darren Locke et al.
The Journal of general physiology, 138(3), 321-339 (2011-08-17)
The mechanisms of action of endogenous modulatory ligands of connexin channels are largely unknown. Previous work showed that protonated aminosulfonates (AS), notably taurine, directly and reversibly inhibit homomeric and heteromeric channels that contain Cx26, a widely distributed connexin, but not
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