| C-23 | Cleaning Prior to Heat Treatment Aluminum | Chemical Processing |
| Superseded by: None | Superseded By: None | |
| Selected sector: AS | Date added: | |
| SupplierNumber | SupplierName | State | CountryName |
| 90174381 | Align Precision 597 North 1500 West | UT | United States |
| 90024576 | ASTRO ALUMINUM TREATING CO INC | CA | United States |
| 90053657 | VALCO MANUFACTURING CO INC | OK | United States |