T6541
Sigma

TES

SigmaUltra, >99.5% (titration)

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Synonym

N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid

TES free acid

2-[(2-Hydroxy-1,1-bis(hydroxymethyl)ethyl)amino]ethanesulfonic acid

Molecular Formula

C₆H₁₅NO₆S

Molecular Weight

229.25

CAS Number

7365-44-8

Beilstein Registry Number

1957061

MDL number

MFCD00007532

PubChem Substance ID

24900386

EG/EC Number

230-906-3

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Properties

grade

SigmaUltra

assay

>99.5% (titration)

total impurities

Insoluble matter, passes filter test

ign. residue (900°C)

<0.1% (as SO₄)

loss

<1% loss on drying, 110°C

3.5-5.0 (20 °C, 1 M in H₂O)

useful pH range

6.8 - 8.2

pKa (25 °C)

7.5

~225 °C (dec.)

solubility

H₂O: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): <0.005%

sulfate (SO₄^2-): <0.005%

cation traces

Al: <0.0005%

As: <0.0001%

Ba: <0.0005%

Bi: <0.0005%

Ca: <0.001%

Cd: <0.0005%

Co: <0.0005%

Cr: <0.0005%

Cu: <0.0005%

Fe: <0.0005%

K: <0.02%

Li: <0.0005%

Mg: <0.0005%

Mn: <0.0005%

Mo: <0.0005%

Na: <0.01%

Ni: <0.0005%

Pb: <0.0005%

Sr: <0.0005%

Zn: <0.0005%

abs.

A1M/260, H₂O <0.055

A1M/280, H₂O <0.045

References

Merck

Merck 13,9253

Safety

Safety Statements

22-24/25

WGK Germany

Related Categories

... Biological Buffers > Buffers A to Z

... Biological Buffers > Good’s Buffers

... Biological Buffers > SigmaUltra Buffers

FT-IR Condensed Phase

FT-IR Raman

MSDS

Specification Sheet

Certificate of Analysis

More Information