Tris
tris [hydroxymethyl] aminomethane
endotoxin tested
Specifications
| CAS | 77-86-1 |
| Grade | ACS/USP |
| Formula weight | 121.14 |
| Formula | C4H11NO3 |
| Physical description | white powder |
| Unit | Min | Max | |
|---|---|---|---|
| Assay (By Titration)(USP) | % | 99.8 | 101 |
| Absorbance At 260nm (1M Solution) | nm | 0 | 0.06 |
| Absorbance At 280nm (1M Solution) | nm | 0 | 0.05 |
| Absorbance At 290nm (1M Solution) | nm | 0 | 0.2 |
| Appearance | Pass | 0 | 0 |
| Endotoxin (Kinetic) | EU/g | 0 | 2.5 |
| Heavy Metals (As Pb)(ppm) | ppm | 0 | 2 |
| Identification (USP) | Pass | 0 | 0 |
| Insoluble Matter | % | 0 | 0.005 |
| Iron (USP) | ppm | 0 | 5 |
| Melting Range Or Temperature (USP) | °C | 168 | 172 |
| Ph | pH | 10.5 | 11.5 |
| Residue On Ignition | % | 0 | 0.1 |
| Expiration Verification (1 Yr. Minimum) | Pass | 0 | 0 |
Notes & Applications
biological buffer
pka: 8.3, effective buffer range pH 7.0 - 9.1
store dry at 15°C to 30°C