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Tris Base CAS 77-86-1


Chemical Name: Tris Base
CAS No.: 77-86-1
Molecular Fomula: C4H11NO3

Molecular weight:  121.14

Appearance: White crystal powder


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Tris Base Quick Details

Chemical Name: Tris Base
CAS No.: 77-86-1
Molecular Fomula: C4H11NO3

Chemical Structure:Tris Base CAS 77-86-1

Tris Base Molecular Weight:  121.14

Tris Base PH(5%): 10.0-11.5

Appearance: White crystal powder


Tris Base Typical Properties

Moisture(by karl fischer)≤0.3%0.19%
UV Absorbance(290nm,40%)≤0.20.050
UV Absorbance(400nm 40%)≤0.20.011
Heavy metals(as pb)≤5ppm<5ppm
Solubility (1.0M solution in water)Immediately soluble yielding a clear haze-free solution free of particulates
Residue on ignition≤0.05%0.00%
Melting point(℃)168.0-172.0171.5-171.9
AppearanceWhite crystal powder

Tris Base Application

1. Tris is often used as a biological buffer with a pH of 6.8, 7.4, 8.0, 8.8. Its structural formula and pH value vary greatly with temperature. In general, for every degree of temperature increase, the pH drops by 0.03.

2. Tris is widely used in the preparation of buffers for biochemical and molecular biology experiments. For example, tries are commonly used in TAE and TBE buffers (for the solubilization of nucleic acids) and in biochemical experiments. Since it contains an amino group, it can undergo a condensation reaction with an aldehyde.

3. Tris is a weak base, and its pKa is 8.1 at room temperature (at 25 ° C; according to the buffer theory, the effective buffer range of Tris buffer is between pH 7.0 and 9.2.

4. The pH of the aqueous solution of the Tris base is about 10.5. Usually, hydrochloric acid is added to adjust the pH to the desired value to obtain a buffer of the pH. But at the same time, attention should be paid to the effect of temperature on the pKa of Tris.

Tris Base Packaging and Shipping 

Tris Base25kgs per drum

Tris Base Storage

Dry cool place

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