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HEPES

HEPES Structure
CAS No.
7365-45-9
Chemical Name:
HEPES
Synonyms
HEPES BUFFER;4-(2-HYDROXYETHYL)-1-PIPERAZINEETHANESULFONIC ACID;hepes solution;HYDROXYETHYLPIPERAZINE ETHANE SULFONIC ACID;Biological Buffer;HEPES buffer Solution;4-(2-HYDROXYETHYL)PIPERAZINE-1-ETHANESULFONIC ACID;4-(2-hydroxyethyl)piperazin-1-ylethanesulphonic acid;2-[4-(2-HYDROXYETHYL)-1-PIPERAZINYL]ETHANESULFONIC ACID;EPES
CBNumber:
CB5408557
Molecular Formula:
C8H18N2O4S
Molecular Weight:
238.3
MOL File:
7365-45-9.mol
MSDS File:
SDS
Modify Date:
2026/1/27 8:46:37

HEPES Properties

Melting point 234-238 °C
Boiling point 408℃[at 101 325 Pa]
bulk density 560kg/m3
Density 1.07 g/mL at 20 °C
vapor pressure 0Pa at 25℃
refractive index n20/D 1.339
storage temp. 2-8°C
solubility H2O: 1 M at 20 °C, clear, colorless
form powder
color White
PH 5.0-6.5 (1Maqueous solution)
pka 7.5(at 25℃)
PH Range 7.0 - 7.6
biological source synthetic
Water Solubility Soluble
λmax λ: 260 nm Amax: 0.06
λ: 280 nm Amax: 0.04
Merck 14,4654
BRN 883043
Stability Stable. Combustible. Incompatible with strong oxidizing agents. Protect from moisture.
Major Application diagnostic assay manufacturing
Cosmetics Ingredients Functions BUFFERING
InChI 1S/C8H18N2O4S/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14/h11H,1-8H2,(H,12,13,14)
InChIKey JKMHFZQWWAIEOD-UHFFFAOYSA-N
SMILES OCCN1CCN(CC1)CCS(O)(=O)=O
LogP -3.85 at 20℃
CAS DataBase Reference 7365-45-9(CAS DataBase Reference)
EPA Substance Registry System 1-Piperazineethanesulfonic acid, 4-(2-hydroxyethyl)- (7365-45-9)
Absorption ≤0.05 at 290 in H2O at 33%

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P271-P280
PPE Eyeshields, Gloves, type N95 (US)
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  24/25-22-36-26
WGK Germany  1
RTECS  TL6809000
TSCA  TSCA listed
HS Code  29335995
Storage Class 13 - Non Combustible Solids
NFPA 704
1
2 1

HEPES price More Price(60)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich(India) RDD002 HEPES anhydrous, free-flowing, Redi-Dri?, ≥99.5% 7365-45-9 1KG ₹65361.35 2022-06-14 Buy
Sigma-Aldrich(India) RDD002 HEPES anhydrous, free-flowing, Redi-Dri?, ≥99.5% 7365-45-9 2.5KG ₹107427.3 2022-06-14 Buy
Sigma-Aldrich(India) H7523 HEPES BioXtra, pH 5.0-6.5 (1?M in H2O), ≥99.5% (titration) 7365-45-9 50G ₹11582.75 2022-06-14 Buy
Sigma-Aldrich(India) PHR1428 HEPES Pharmaceutical Secondary Standard; Certified Reference Material 7365-45-9 1G ₹8346.08 2022-06-14 Buy
Sigma-Aldrich(India) H6147 HEPES BioXtra, suitable for mouse embryo cell culture, ≥99.5% (titration) 7365-45-9 25G ₹6765.63 2022-06-14 Buy
Product number Packaging Price Buy
RDD002 1KG ₹65361.35 Buy
RDD002 2.5KG ₹107427.3 Buy
H7523 50G ₹11582.75 Buy
PHR1428 1G ₹8346.08 Buy
H6147 25G ₹6765.63 Buy

HEPES Chemical Properties,Uses,Production

Description

HEPES has been described as one of the best all-purpose buffers available for biological research. At biological pH, the molecule is zwitterionic, and is effective as a buffer at pH 6.8 to 8.2 (pKa 7.55). It is typically used in cell culture at concentration between 5mM to 30 mM. HEPES has been used in a wide variety of applications, including tissue culture. It is commonly used to buffer cell culture media in air. HEPES finds its usage in in vitro experiments on Mg.

Chemical Properties

White crystalline powder

Uses

Non-toxic to cell. It is used as a hydrogen ion buffer, which can control the constant pH range for long term. The concentration is 10-50mmol/L. Generally, 20mmol/LHEPES in nutrient solution can get buffer ability.

Uses

HEPES is a biological buffer. It may be used in isoelectric focusing applications and as a buffer in the quantitative and selective measurement of antigen-antibody reactions. HEPES is reportedly superior to NaHCO3 in controlling pH in tissue and organ culture. HEPES is not recommended for use with the Folin-Ciocalteu protein assay. 

Definition

ChEBI: A HEPES that is ethanesulfonate substituted by a 4-(2-hydroxyethyl)piperazin-4-ium-1-yl group at position 2.

General Description

HEPES buffered saline is a tissue culture buffer, which is used to maintain the pH of cell culture. It is water soluble and atmosphere independent. HEPES destroys magnesium in sodium chloride solutions.

Biological Activity

HEPES is a multi purpose HEPES buffer used in cell culture and other biological research. Working pH range in aqueous solution: 6.8 - 8.2. Does not form complexes with metal ions. Used in cell culture media.

Purification Methods

Crystallise the acid from hot EtOH and water. It is a useful buffer. [Beilstein 23 V 376.]

HEPES Preparation Products And Raw materials

Raw materials

Preparation Products

Global( 993)Suppliers
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HEPES 2-[4-(2-HYDROXYETHYL)-1-PIPERAZINYL]ETHANESULFONIC ACID MOLECULAR BIOLOGY GRADE HEPES 2-[4-(2-HYDROXYETHYL)-1-PIPERAZINYL]ETHANESULFONIC ACID 99+% N-(2-HYDROXYETHYL)-PIPERAZINE-N'-2-ETHANESULFONIC ACID(4-(2-HYDROXYETHYL)PIPERAZINE-1-ETHANESULFONIC ACID(HEPES-ACID)) Hepes,FreeAcid(N-[2-Hydroxyethyl]Piperaz 1-HeptaneSulfonicAcidSod.SaltGr N-(2-Hydroxyethyl)Piperazine-N'-(3-EthanesulfonicAcid) N-(2-Hydroxyethyl)Piperazine-N'-(2-EthanesulfonicAcid)(Hepes) Hepes,LowSodium,FreeAcid HEPES free acid, DNase, Rnase and Protease free, for molecular biology, 99+% Hydroxyethyl)-1-piperazineethyanesulfonic acid, 4-(2- 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid(HEPES) 2-(4-(2-Hydroxyethyl)piperazin-1-yl)ethanesulfonic acid 4-(2-hydroxyerhyl)piperazine-1-erhaesulfonic acid HEPES, for biochemistry, 99% 4-(2-Hydroxyethyl)-1-Piperazin Hydroxyethyl)piperazine-N'-2-ethane sulfonic acid 1-Piperazineethanesulfonic acid, 4-(2-hydroxyethyl)- N-(2-hydroxymethyl)piperazine-N`-(2-ethanesulfonic acid)(HEPES) N-2-HYDROXYETHYLPIPERAZINE-N-2-ETHANSULFONICACID(HEPES) 4-(2-Hydroxyethyl)piperazin-1-ylethansulfonsure 2-[4-(2-Hydroxyethyl)-1-piperazine]ethanesulfonic acid HEPES HEPES / 4-(2-HYDROXYETHYL)-1-PIPERAZINEETHANESULPHONIC ACID HEPES (4-(2-HYDROXYETHYL)PIPERAZINE-1-ETHANESULFONIC ACID) HEPES ULTRAPURE N-2-HYDROXYETHYLPIPERAZINE-N''-2-ETHANE SULPHONIC ACID >99.5% N-[2-HYDROXYERHYL]PIPERAZINE-N''-ETHANESULFONICACID(HEPES) HEPES free acid ultrapure N-2-Hydroxyethylpiperazine-N'-2-ethanesulphonic acid, low sodium >99.5% HEPES(N-[2-Hydroxyethyl]piperazine-N'-[Ethanesulfonic acid]),Free Acid N'-2-N-2-hydroxyethyl piperazineethanesulfonic acid HEPES, >=99.5% (titration) HEPES SynonyMs 4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid HEPES,4-(2-hydroxyerhyl)piperazine-1-erhanesulfonic acid HEPES Vetec(TM) reagent grade, 99.5% 4-CHLORO-1-NAPHTHOL ULTRA PURE GRADE POTASSIUM HYDROXIDE 0,05 MOL DUTY PAID POTASSIUM HYDROXIDE 0,5MOL/L DUTY PAID POTASSIUM HYDROXIDE 1 MOL/L DUTY PAID SELENIUM STAND MALATE DEHYDROGENASE ULTRA PURE GRADE PHOSPHOTUNGSTIC ACID HIGH PURITY GRADE 4-(2-hydroxyethyl)-1-piperazineethanesulfonicaci hepesfreeacid 2-[4-(2-HYDROXYETHYL)-1-PIPERAZINE]ETHANESULFONIC ACID LABOTEST-BB LT00138109 LABOTEST-BB LT00233156 HEPES HEPES-ACID 4-(2-Hydroxyethyl)-1-piperazineethanesulphonic acid hepes free acid molecular biology*reagent HEPES N-(2-Hydroxyethyl)piperazine-N-(2-ethanesulfonic acid) HEPES, 1M solution HEPES, Free Acid, MB Grade (1.12041) HEPES, Free Acid, ULTROL Grade HEPES, Molecular Biology Grade N-(2-Hydroxyethyl)piperazine-N-(2-ethanesulfonic acid), Molecular Biology Grade HEPES, Tissue Culture Tested N-(2-Hydroxyethyl)piperazine-N-(2-ethanesulfonic acid), Tissue Culture Tested N-(2-HYDROXYETHYL)PIPERAZINE N-2-ETHANESULFONIC ACID N-2-HYDROXYETHYLPIPERAZINE-N'-2-ETHANE SULPHONIC ACID