MilliporeSigma
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PHG0002

SAFC

TRIS hydrochloride

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Synonym(s):
Trizma® hydrochloride, TRIS HCl, TRIS hydrochloride, Tris(hydroxymethyl)aminomethane hydrochloride, Tromethane hydrochloride
Linear Formula:
NH2C(CH2OH)3 · HCl
CAS Number:
Molecular Weight:
157.60
Beilstein:
3675235
EC Number:
MDL number:
NACRES:
NA.21

biological source

synthetic

form

powder

technique(s)

cell culture | mammalian: suitable

impurities

Endotoxin, microbial, and trace metals; tested

useful pH range

7.0-9.0

pKa (25 °C)

8.1

suitability

suitable for manufacturing use

foreign activity

Cytotoxicity, DNase, NICKase, RNase, and Protease; tested

SMILES string

Cl.NC(CO)(CO)CO

InChI

1S/C4H11NO3.ClH/c5-4(1-6,2-7)3-8;/h6-8H,1-3,5H2;1H

InChI key

QKNYBSVHEMOAJP-UHFFFAOYSA-N

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Application

Tris HCl is a commonly used biological buffer. Tris/Tris HCl as a buffering system has a very broad usage in biological systems for biopharmaceutical manufacturing, cell culture, diagnostics and molecular biology. The pKa of Tris is 7.77 which corresponds closely to a physiological pH of 7.36.

Tris HCl is used as the conjugate buffer component with Tris/Tromethamine/Trizma in biopharmaceutical buffer formulations (both upstream and downstream applications), electrophoresis separations and diagnostic reagent formulations.

Other Notes

The pH values of all buffers are temperature and concentration dependent. For Tris buffers, pH increases about 0.03 unit per °C decrease in temperature, and decreases 0.03-0.05 unit per ten-fold dilution. For precise applications, use a carefully calibrated pH meter with a glass/calomel combination electrode.

Legal Information

Trizma is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(C)

Not applicable


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