| Not official USP-NF text | Column Equivalency Information | |
| PACKING | Butyl silane chemically bonded to totally porous silica particles, 3 - 10 µm in diameter. | |
| L26 | BRAND NAME | MANUFACTURER |
| Delta-Pak C4 | Waters Associates | |
| Vydac 214ATP5 C4 | Separations Group | |
| Vydac 214TP54 C4 | Separations Group | |
| Vydac C4 | Grace-Vydac | |
| YMC-Pack C4 | YMC Co. Ltd. | |