Tris is one of the most widely used buffers in molecular biology and cell culture due to its low toxicity, stability and buffering capacity.
Purity: (same/more than)99.9%
Appearance: White, crystalline powder
pH (1M): 10.5-11.5
pKa: 8.0-8.4
Absorbance (260nm): (same/less than)0.06
Absorbance (280nm): (same/less than)0.05
Absorbance (290nm): (same/less than)0.2
Solubility (1M): Colorless, clear, complete
Loss on Drying: (same/less than)0.2%
Melting Point: 168-172 degrees C
Heavy Metals (Pb): (same/less than)0.0001%
Arsenic: (same/less than)0.0001%
Calcium: (same/less than)0.0001%
Copper: (same/less than)0.0001%
Iron: (same/less than)0.0005%
Magnesium: (same/less than)0.0001%
Insoluble Matter: (same/less than)0.005%
Residue on Ignition: (same/less than)0.1%
RNase: DNase: Protease:
Meets specifications.
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