Main Oxide Components of the Glasses Used for the Vials
| Oxides Included | Standard Quality Vialsa | Low-Fill Quality Vialsa | Aluminosilicate Vials |
|---|---|---|---|
| SiO2 | Yes (75) | Yes (75) | Yes |
| Al2O3 | Yes (5) | Yes (5) | Yes |
| B2O3 | Yes (10.5) | Yes (10.5) | No |
| Na2O | Yes (7) | Yes (7) | Yes |
| MgO | No | No | Yes |
| CaO | Yes (1.5) | Yes (1.5) | Yes |
↵a Values in parentheses are wt %.