Thiodiazole derivative Product Code: E1311 Brand Name: Aqualem® Rz-W20 CAS No.: 55906-42-8 Main Content: S: 21% Application: Rz-W20 is water-based green extreme pressure additive, it can fully replace chlorinated paraffin wax in metalworking fluid, and provide better performance of EP/AW. It is easier to use due to liquid. Aqualem® Rz-W20 has the same good quality as RC5202.