High qulity Tris buffer 99.8%

Description

Appearance.....................white crystalline powder
Assay, %...........................................................≥*9.5
Melting point, °C..................................**8.****1.0
Solubility (*0% aq.)........clear, colorless solution
Heavy metals (as Pb),ppm.................................≤5
Water content,%................................................≤0.2
pH(5% aq. olution,*5°C).........................*0.***1.5
Iron(Fe),ppm..........................................................≤1
Sulfate(SO4),ppm...............................................≤*0
Chloride(Cl),ppm..................................................≤3
Ultraviolet absorbance (*0% aq.)................≤0.*7
Ultraviolet absorbance (*0% aq.)................≤0.*2
Infrared spectrum...............conforms to reference