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H9897

Sigma-Aldrich

HEPES hemisodium salt

dry powder

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Synonym(s):
4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid hemisodium salt, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid) hemisodium salt
Empirical Formula (Hill Notation):
C8H17.5N2O4S· 0.5Na
CAS Number:
Molecular Weight:
249.30
PubChem Substance ID:
NACRES:
NA.25

form

dry powder

pH

7.0-8.0

useful pH range

6.8-8.2

pKa 

7.5

storage temp.

room temp

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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This Item
H7637H7006H0527
HEPES hemisodium salt dry powder

Sigma-Aldrich

H9897

HEPES hemisodium salt

HEPES hemisodium salt ≥99% (titration)

Sigma-Aldrich

H7637

HEPES hemisodium salt

HEPES sodium salt ≥99.0% (titration)

Sigma-Aldrich

H7006

HEPES sodium salt

HEPES potassium salt ≥99.5% (titration)

Sigma-Aldrich

H0527

HEPES potassium salt

pH

7.0-8.0

pH

7.4-7.7 (25 °C, 0.1 M in water)

pH

10-12 (1 M in water)

pH

-

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

storage temp.

-

Quality Level

200

Quality Level

200

Quality Level

400

Quality Level

200

useful pH range

6.8-8.2

useful pH range

6.8-8.2

useful pH range

6.8-8.2

useful pH range

6.8-8.2

pKa 

7.5

pKa 

7.5

pKa 

-

pKa 

7.5

Packaging

foil pouches

Reconstitution

Contents of each pouch dissolved in 1 liter deionized water will yield 0.1 M sodium HEPES buffer, pH 7.5 at 25 °C.

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

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T1503
Product Number
-
25G
Pack Size/Quantity

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705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

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  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

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