MES hemisodium salt

CAS 117961-21-4C6H13NO4S·0.5NaBiochemicals & Reagents

MES hemisodium salt (CAS: 117961-21-4, Formula: C6H13NO4S·0.5Na, MW: 206.73) is a white to off-white dry powder. As a zwitterionic buffering agent, it maintains stable pH in biological and biochemical research applications, particularly within the useful range of pH 5.5 to 6.7. Its properties make it suitable for applications in molecular biology, proteomics, and electrophoresis.

IUPAC: 2-(N-Morpholino)ethanesulfonic acid hemisodium salt,4-Morpholineethanesulfonic acid hemisodium salt

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MES hemisodium salt (C6H13NO4S·0.5Na) — chemical structure, CAS 117961-21-4; Life Science, fine chemical supplied by Tech Serve Solutions

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01 /Applications

Biological Buffering

This MES salt serves as a biological buffer, maintaining stable pH conditions essential for enzymatic assays, cell culture, and other sensitive biological experiments within its effective pKa range.

Molecular Biology and Proteomics

It is widely employed in molecular biology and proteomics for applications such as protein electrophoresis and western blotting, where precise pH control is critical for sample integrity and experimental reproducibility.

Electrophoresis

The compound is utilised in electrophoresis buffers to ensure consistent ion mobility and stable pH gradients, facilitating accurate separation of biomolecules.

02 /Properties

Molecular weight	206.73
Empirical formula	C6H13NO4S·0.5Na
Assay	≥98% (titration)
Form	dry powder
Impurities tested	≤8% water content (Karl Fischer)

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Water hazard class (WGK, DE)	3
Cation traces	Pb: ≤5 ppm

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

117961-21-4

MDL number

MFCD00079460

PubChem substance

24896538

05 /Additional specifications

Pka	6.1
Useful Ph Range	5.5 - 6.7

06 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

07 /Frequently asked questions

What is MES hemisodium salt used for?

MES hemisodium salt is used as a biological buffer in research applications, including molecular biology, proteomics, and electrophoresis, maintaining pH in the range of 5.5-6.7.

What are the CAS number and formula for MES hemisodium salt?

The CAS number is 117961-21-4 and the empirical formula is C6H13NO4S·0.5Na.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies MES hemisodium salt with an assay of ≥98% (titration), and a water content of ≤8% (Karl Fischer). This product is supplied for research and technical use and is not represented as USP, BP, EP, or other pharmacopoeia grades.

How should MES hemisodium salt be handled safely?

When handling MES hemisodium salt, wear appropriate personal protective equipment including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if respiratory protection is needed. The substance has a WGK rating of 3, indicating it is hazardous to water.

How is MES hemisodium salt packed and shipped?

MES hemisodium salt is supplied as a dry powder. TSS is a global supplier and exporter, capable of shipping this chemical worldwide according to relevant regulations.