Bio Ultra Grade 

MES MonohydrateDiagnostic, Reagent Grade 


Product Code: MESM-5220 

CAS #: 145224-94-8

Molecular Formula: C6H13NO4S.H2O

Solubility in Water (g/L): 310

F.W.: 213.25 g/mol

pH @ 20°C: 2.5 - 4.5

Useful pH: 5.5 - 6.7

pKa @ 20°C: 6.1


Minimum Order Quantity: 100kg | Lead Time: 1-month  | Package Sizes: 10kg, 25kg and 50kg pails. 

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Intended for Use in Diagnostic and Laboratory Applications 

  • MES Monohydrate is a zwitterionic buffer that is not absorbed through cell membranes and is virtually transparent in UV light. MES is a buffering agent used in many biological and biochemical applications. It is also used as a running buffer for denaturing gel electrophoresis. The characteristics of low UV absorptivity, minimal reactivity, stable pH and solubility in water allow MES Monohydrate to be used as a “Good’s” buffer. These are general specifications. BioBuffer Solutions will customize our products to meet your quality based requirements.

General Product Description:

  • MES Monohydrate is a White Crystalline product.
  • Molecular Formula: C6H13NO4S.H20
  • Molecular Weight: 213.25 g/mol.
  • CAS Number: 145224-94-8.
  • Synonyms: 2-(N-Morpholino)ethanesulfonic acid, 4-Morpholineethanesulfonic acid monohydrate.

Intended Use Statement:

  • Material represented by this grade is suitable to be used only as the following: Quality System Manufactured Process Chemical for use in further manufacturing or as a reagent for laboratory and research. The material represented by this grade is not suitable to be used as an Excipient, Active Pharmaceutical Ingredient, Drug, Drug Product or household item.

Expiration/Retest Date:

  • BioBuffer Solutions does not assign expiration or retest dates for Bio Ultra Grade materials.

Storage and Shipping Conditions:

  • Ship and Store in ambient temperature.

Package Sizes:

  • 10kg, 25kg and 50kg pails.

Bulk GMP Fine Chemicals exclusively manufactured in North America


American Manufactured - FDA Registered GMP Facilities: Parenteral Excipients, GMP Small Molecule Intermediates, GMP Biological Buffers, Parenteral Carbohydrates, GMP Chlorinated Amino Acids, GMP Solutions in Sterile Single Use Packaging and other Reagent & GMP Fine Chemicals.