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CHES

Name: CHES
Brand: SIGMA
Price: 72 USD
Availability: InStock

BioXtra, ≥99.0% (titration)

Synonym(s):

2-(Cyclohexylamino)ethanesulfonic acid

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Size/SKU	Availability	Price
25 g	Available to ship onAugust 05, 2026fromMILWAUKEE	$72.00
100 g	Available to ship onAugust 05, 2026fromMILWAUKEE	$286.00

About This Item

Empirical Formula (Hill Notation):

C₈H₁₇NO₃S

CAS Number:

103-47-9

Molecular Weight:

207.29

UNSPSC Code:

12161700

NACRES:

NA.25

PubChem Substance ID:

24893031

EC Number:

203-115-6

Beilstein/REAXYS Number:

2967601

MDL number:

MFCD00003835

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Properties

product line

BioXtra

Quality Segment

200

assay

≥99.0% (titration)

form

powder

impurities

≤0.0005% Phosphorus (P), ≤0.1% Insoluble matter

ign. residue

≤0.1%

pH

3.0-5.0 (0.5 M in H₂O)

useful pH range

8.6-10.0

pKa (25 °C)

9.3

solubility

H₂O: 0.5 M, clear, colorless

anion traces

chloride (Cl^-): ≤0.05%, sulfate (SO₄^2-): ≤0.05%

cation traces

Al: ≤0.0005%, Ca: ≤0.001%, Cu: ≤0.0005%, Fe: ≤0.0005%, K: ≤0.005%, Mg: ≤0.0005%, NH₄⁺: ≤0.05%, Na: ≤0.01%, Pb: ≤0.001%, Zn: ≤0.0005%

absorption

≤0.05 at 280 in H₂O at 0.5 M, ≤0.08 at 260 in H₂O at 0.5 M

application(s)

diagnostic assay manufacturing

SMILES string

OS(=O)(=O)CCNC1CCCCC1

InChI

1S/C8H17NO3S/c10-13(11,12)7-6-9-8-4-2-1-3-5-8/h8-9H,1-7H2,(H,10,11,12)

InChI key

MKWKNSIESPFAQN-UHFFFAOYSA-N

Description

General description

CHES (2-(Cyclohexylamino) ethane sulfonic acid) is a derivative of amino acid taurine. It serves as a standard physiological buffer in the pH range of 8.5-9.5.

Application

CHES may be used:

for pH adjustments and as a assay buffer in catechol oxidase activity measurements(32)
as a buffer in electron paramagnetic resonance (EPR) spectroscopy and kinetic measurements(33)
as a buffer for soil solution equivalent (SSE) yeast dextrose medium for screening pH optima for growth of Aridibacter nitratireducens A24_SHP-5_238^T(34)

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Show Differences

1 of 1

This Item	29311	C2885	C6013
Sigma-Aldrich C8210 CHES	Sigma-Aldrich 29311 CHES	Sigma-Aldrich C2885 CHES	Sigma-Aldrich C6013 Cholesteryl hemisuccinate tris salt
description BioXtra, ≥99.0% (titration)	description BioUltra, ≥99.5% (T)	description ≥99.0% (titration)	description anionic detergent
assay ≥99.0% (titration)	assay ≥99.5% (T)	assay ≥99.0% (titration)	assay ≥98% (TLC)
Quality Level 200	Quality Level 200	Quality Level 200	Quality Level 200
product line BioXtra	product line BioUltra	product line -	product line -
form powder	form powder	form crystalline	form powder
application(s) diagnostic assay manufacturing	application(s) -	application(s) diagnostic assay manufacturing	application(s) -
pH 3.0-5.0 (0.5 M in H₂O)	pH 3.0-5.0 (25 °C, 0.5 M in H₂O)	pH 3.0-5.0 (103.6 g/L)	pH -

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Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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