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54461

Sigma-Aldrich

HEPES

≥99.0% (titration), powder or crystals

Synonym(s):

4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)

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About This Item

Empirical Formula (Hill Notation):
C8H18N2O4S
CAS Number:
7365-45-9
Molecular Weight:
238.30
Beilstein/REAXYS Number:
883043
EC Number:
230-907-9
MDL number:
MFCD00006158
UNSPSC Code:
12161700
PubChem Substance ID:
329758032

Product Name

HEPES, ≥99.0% (T)

assay

≥99.0% (T)

form

powder or crystals

ign. residue

≤0.1% (as SO4)

loss

≤0.5% loss on drying, 110 °C

pH

5.0-6.5 (25 °C, 238 g/L)

useful pH range

6.8-8.2

pKa (25 °C)

7.5

solubility

water: 2.38 g/10 mL, clear to slightly hazy, colorless to almost colorless

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤300 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤100 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

OCCN1CCN(CC1)CCS(O)(=O)=O

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)

InChI key

JKMHFZQWWAIEOD-UHFFFAOYSA-N

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Other Notes

Biological buffer[1][2]

replaced by

Product No.
Description
Pricing

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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