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Product Name

 TRIS BUFFER AR (FOR BIOCHEMISTRY)

Article No

 T0210405000

CAS No

 77-86-1

Molecular Formula

 NH2C(CH2OH)3

Molecular Weight

 121.14

Specifications

Appearance:

 White crystalline powder

Sulphated ash:

 Max 0.01%

Chloride (Cl):

 Max 0.001%

Water (H2O):

 Max 0.5%

pH (5% solution in water):

 10 - 11

Assay (by HClO4 titration; on anhydrous basis):

 Min 99.5%

Absorptivity at 250 nm - 440 nm (A 1%/1cm; 10% in water):

 Passes test

Biological buffer at 25°C:

 pKa 8.07

Melting point:

 169 - 171°C