| Business | Phone |
| Activated Metals & Chemicals 400 N Sam Houston Pkwy E, Houston 77060 | (281) 448-1311 |
| Procatalyse Usa Inc 1800 Saint James Pl 500, Houston 77056 | (713) 840-1133 |
| C S Metal Of Louisiana 16825 Northchase Dr 1034, Houston 77060 | (281) 874-9898 |
| Catalyst International Assoc 6125 W Sam Houston Pkwy N, Houston 77041 | (832) 467-3877 |
| Catalyst Regeneration Svc 6320 Windswept Ln, Houston 77057 | (713) 783-8771 |
| Catalyst Trading Co 7509 Avenue N, Houston 77012 | (713) 926-6078 |
| Chep Catalyst & Chemical 4935 Timber Creek Dr, Houston 77017 | (713) 926-3330 |
| Criterion Catalyst Co Houston 77090 | (281) 880-7378 |
| Criterion Catalysts & Tech 16825 Northchase Dr 1000, Houston 77060 | (281) 874-2130 |
| Crystaphase International Inc 16825 Northchase Dr 660, Houston 77060 | (281) 874-2110 |
| Davison Catalysts 3828 N Sam Houston Pkwy E, Houston 77032 | (281) 449-9949 |
| Engelhard Minerals & Chemicals 1800 Saint James Pl # 501, Houston 77056 | (713) 627-0621 |
| Haldor Topsoe Inc 17629 El Camino Real 300, Houston 77058 | (281) 228-5000 |
| Johnson Matthey Catalysts 1100 Hercules Ave 200, Houston 77058 | (281) 488-0638 |
| Intercat 8811 Westheimer Rd 209, Houston 77063 | (713) 785-1085 |