Molekula

BES (N,N-Bis(2-hydroxyethyl)-2-aminoethanesulfonic acid)

SKU 58714707 CAS 10191-18-1 C6H15NO5S MW 213.25 In stock

BES, or N,N-Bis(2-hydroxyethyl)-2-aminoethanesulfonic acid, is a zwitterionic buffering agent commonly used in biochemical and molecular biology applications, particularly in protein and enzyme studies. It maintains stable pH in the physiological range and is valued for its low ionic strength and minimal interference with biological processes. CAS: 10191-18-1, Molecular Formula: C6H15NO5S, Molecular Weight: 213.25, Storage: Ambient, Signal Word: Warning. Molekula supplies BES from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

CoA by batch Download specification

Overview

Pricing & pack sizes

Pack sizes & pricing

£ GBP € EUR $ USD

100 g — £37.30 per pack
500 g — £140.00 per pack

Prices exclude VAT/sales tax and shipping. Bulk and custom pack sizes available on request.

Specifications

Download PDF

Property	Value
Appearance	White powder
Identification	Conforms to reference
Assay	≥99.0%
Moisture	≤1.0%
Pka	6.9 - 7.3
A280 nm	≤0.08
Solubility (0.1 M in H2O)	Clear and complete
UV A260nm	≤0.10

Storage & handling

Property	Value
Storage Temperature	Ambient
Shelf Life	60 months
Acidity	Acid

Identification

Property	Value
SKU	58714707
CAS Number	10191-18-1
Molecular Formula	C6H15NO5S
Molecular Weight	213.25
SMILES	C(CO)N(CCO)CCS(=O)(=O)O
REACH Code	Y113
TSCA Listed	Yes
HTS Code	2922199690
Tariff Code	2922190090

Safety & GHS

Warning

Health Hazard GHS07

Hazard statements

H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation

Precautionary statements

P264 Wash thoroughly after handling
P280 Wear protective gloves/protective clothing/eye protection/face protection
P302+352 IF ON SKIN: Wash with soap and water
P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing
P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
P403+233 Store in a well ventilated place. Keep container tightly closed

For research and industrial use only

Not for use in food, drugs, household, or in or on humans or animals. Consult the Safety Data Sheet before handling.

Documents

Safety Data Sheets (SDS)

Available in IT, FR, ES, DE, EN.

Certificate of Analysis (CoA) by batch

Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.

Synonyms

No alternate names recorded for this product.

Frequently asked questions

What is BES used for?

BES is primarily used as a zwitterionic buffer in biochemical and molecular biology applications, especially in electrophoresis and protein studies.

What is the chemical formula and molecular weight of BES?

The formula of BES is C6H15NO5S with a molecular weight of 213.25 g/mol.

How should BES be stored?

BES should be stored at ambient temperature, protected from moisture and light.

What grade of BES does Molekula supply?

Molekula supplies BES in high-purity grade suitable for research and laboratory use.

Can Molekula supply BES in bulk?

Yes, Molekula can supply BES in bulk quantities—please contact our sales team for pricing and availability.

What documentation comes with a BES order?

Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) with the shipment.

Ready to order or need a custom pack?

Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.

Talk to a chemist

Documents Pricing