Tris Hydrochloride
tris [hydroxymethyl] aminomethane hydrochloride
Specifications
| CAS | 1185-53-1 |
| Grade | ultra pure |
| Formula weight | 157.6 |
| Formula | C4H11NO3•HCl |
| Physical description | white crystalline powder |
| Unit | Min | Max | |
|---|---|---|---|
| Absorbance At 260nm (1M Solution) | nm | 0 | 0.06 |
| Absorbance At 280nm (1M Solution) | nm | 0 | 0.05 |
| Absorbance At 400nm (1M Solution) | nm | 0 | 0.01 |
| Appearance (White Crystalline Powder) | Pass | 0 | 0 |
| Insoluble Matter (ACS) | % | 0 | 0.005 |
| Iron | ppm | 0 | 5 |
| Loss On Drying | % | 0 | 0.5 |
| Lead (Pb) | ppm | 0 | 5 |
| Melting Range | °C | 149 | 153 |
| Residue On Ignition (ACS) | % | 0 | 0.1 |
| Copper | ppm | 0 | 1 |
| Expiration Verification (1 Yr. Minimum) | Pass | 0 | 0 |
| pH (0.5M Solution In H2O) | pH | 3.5 | 5 |
| Pka | 8 | 8.4 | |
| Purity (Dried Basis) | % | 99 | 101 |
| Solubility (1M In Water) | Pass | 0 | 0 |
Notes & Applications
biological buffer
pka: 8.3, effective buffer range pH 7.0 - 9.1
store at 15°C to 30°C