by Welch Materials
| Vendor | Welch Materials | Length | |
| Brand | Ultisil XB-C4 | Internal Diameter | |
| Modifification | Silica/C4 | Pore size | 300 |
| Mode | Reversed-Phase | Surface Area | 320 |
| Particle Size |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| Thermo Fisher Scientific | BioBasic | Reversed-Phase | Silica/C4 | 1.0 mm | 50 mm | — | 300 Å | On request |
| Higgins Analytical | PROTO 300 C4 | Reversed-Phase | Silica/C4 | 10.0 mm | 50 mm | 10.0 μm | 300 Å | On request |
| Chromenta | Chromenta KB C4 | Reversed-Phase | Silica/C4 | 4.6 mm | 50 mm | 5.0 μm | 120 Å | On request |
| ACE | ACE C4-300 | Reversed-Phase | Silica/C4 | 10.0 mm | 250 mm | 5.0 μm | 300 Å | On request |
| ES Industries | Chromegabond 300 C4 | Reversed-Phase | Silica/C4 | 2.0 mm | 250 mm | 5.0 μm | 300 Å | On request |
| RESTEK | Viva | Reversed-Phase | Silica/C4 | 4.6 mm | 30 mm | 5.0 μm | 300 Å | On request |
| Aapptec | Spirit Protein | Reversed-Phase | Silica/C4 | 21.2 mm | 250 mm | 5.0 μm | 300 Å | On request |
| Teknokroma | Europa Protein 300 C4 | Reversed-Phase | Silica/C4 | 21.2 mm | 150 mm | 5.0 μm | 300 Å | On request |
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