HEPES Sodium Salt Buffer

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Cell culture media | Pharmaceutical
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Assay (titr.): ≥ 99% | CAS No: 75277-39-3 | Useful pH range: 6.8 – 8.2

Hopax is a manufacturer and supplier of HEPES Sodium Salt (CAS 75277-39-3), a zwitterionic biological buffer often used as a buffering agent in biological and biochemical research.

More about HEPES Buffer

Solubility in water: (Compare with other buffers)

  • 26g/100ml


  • Store at room temperature
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Assay (titr.)

≥ 99%

Useful pH range

6.8 – 8.2
Compare with other buffers


White powder

Molecular formula


Molecular weight

260.3 g/mol

Solubility (1M in H2O)

Clear and Complete

pKa (25°C)

7.35 – 7.75

Moisture (LOD)

≦ 1.5%

pH (1M in H2O) 


UV (1M in H2O) A260nm

≦ 0.2

UV (1M in H2O) A280nm 

≦ 0.2

Customized specifications are available for bulk requests. Contact us to discuss your requirements.

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Synonyms / Similar names:

  • 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid sodium salt
  • N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid) sodium salt
  • HEPES Na

What we offer:

  • Worldwide shipping
  • Certificate of Analysis (CoA)
  • Safety Data Sheet (SDS)
  • Analytical tests (DNase, RNase, protease activity, heavy metals and others upon request)

Lead time:

  • 15 business days after order confirmation

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