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54461 Sigma-Aldrich

HEPES

≥99.0% (T)

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

  • CAS Number 7365-45-9

  • Empirical Formula (Hill Notation) C8H18N2O4S

  • Molecular Weight 238.30

  •  Beilstein Registry Number 883043

  •  EC Number 230-907-9

  •  MDL number MFCD00006158

  •  PubChem Substance ID 329758032

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Properties

InChI Key   JKMHFZQWWAIEOD-UHFFFAOYSA-N
assay   ≥99.0% (T)
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
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

Description

Other Notes

Biological buffer

Price and Availability

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
TL6809000

Documents

Certificate of Analysis

Protocols & Articles
Peer-Reviewed Papers
15

References

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Description

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H7523 HEPES, BioXtra, pH 5.0-6.5 (1 M in H2O), ≥99.5% (titration)

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