MES

CAS 4432-31-9C6H13NO4SBiochemicals & Reagents

MES (CAS 4432-31-9), with the molecular formula C6H13NO4S and a molecular weight of 195.24 g/mol, is a zwitterionic N-substituted aminosulfonic acid. It functions as a biological buffer, maintaining stable pH conditions in various biochemical and biological research applications. Its low UV absorbance and minimal metal ion binding make it suitable for sensitive assays. This ELITE quality product is commonly used in diagnostic assay manufacturing.

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MES (C6H13NO4S) — chemical structure, CAS 4432-31-9; Life Science, fine chemical supplied by Tech Serve Solutions

Biochemicals and ReagentsBiological BuffersBuffers A to ZGood’s Buffers

01 /Applications

Biological Buffering Agent

MES is employed to maintain stable pH levels in biological research, enzymatic assays, and cell culture media. Its pKa of 6.1 and useful pH range of 5.5-6.7 make it ideal for applications requiring mildly acidic to neutral conditions.

Diagnostic Assay Manufacturing

This compound is a key reagent in the manufacturing of diagnostic assays. Its consistent purity and buffering capacity ensure reliable performance in sensitive in-vitro diagnostic products.

Electrophoresis and Chromatography

MES can be utilized as a buffer component in electrophoresis and chromatography techniques where precise pH control is critical for separating biomolecules.

02 /Properties

Molecular weight	195.24
Empirical formula	C6H13NO4S
Assay	≥99% (titration)
pH	2.5-4.0 (25 °C in neat)
Concentration	0.5 M in H2O
Impurities tested	≤1.0% water

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Water hazard class (WGK, DE)	1
Anion traces	chloride (Cl-): ≤10 mg/kgsulfate (SO42-): ≤10 mg/kg

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

04 /Identifiers & registry

CAS number

4432-31-9

MDL number

MFCD00006181

PubChem substance

24896867

Beilstein registry

141319

05 /Additional specifications

Quality Level	ELITE
Pka	6.1
Market Segment	Diagnostic Assay Manufacturing
Uv Absorption	λ: 260 nm Amax: 0.01λ: 280 nm Amax: 0.01
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 used for?

MES is primarily used as a biological buffer in research and diagnostic assay manufacturing, maintaining pH in the range of 5.5-6.7.

What are the CAS number and formula for MES?

The CAS number for MES is 4432-31-9, and its molecular formula is C6H13NO4S.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies MES at an ELITE quality level with an assay of ≥99% by titration. It is not represented as USP, BP, or EP grade.

How should MES be handled safely?

Handle MES with appropriate personal protective equipment, including eyeshields and gloves. Ensure adequate ventilation, and use a type N95 (US) or type P1 (EN143) respirator filter if dust is generated. Refer to the Safety Data Sheet for full handling precautions.