N-tri (hydroxymethyl) methyl-2-aminoethanesulfonic acid /tris ethanesulfonic acid /TES

English name：TES；N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid；TES free acid

Other names: tris ethanesulfonic acid; 2 - [(tri (hydroxymethyl) methyl) amino] - 1-ethanesulfonic acid; N-trimethylolmethyl-2-aminoethanesulfonic acid; 2-[[Tri (hydroxymethyl) methyl] amino] ethanesulfonic acid; Trimethylol aminomethane ethanesulfonic acid; N-tri (hydroxymethyl) methyl-2-aminoethane sulfonic acid; 3 - [(hydroxymethyl) methylamine] ethane sulfonic acid

CAS No.: 7365-44-8

C6H15NO6S=229.25

Grade: high purity grade

Content: ≥ 99.0%

UV absorbance /260nm: ≤ 0.055

UV absorbance /280nm: ≤ 0.045

Calcium salt: ≤ 10ppm

Iron: ≤ 5ppm

Arsenic: ≤ 5ppm

PH（1% water）：4.7～6.0

Physicochemical properties: white crystalline powder. useful pH range：6.8～8.2； pKa (25 °C) 7.5； Melting point ~ 225 ° C

Purpose: biochemical research. Biological buffer 

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