Sulfur Hexafluoride-SF6 Proper Shipping Name: Sulfur Hexafluoride UN NO.: UN 1080 Hazard labels: 2.2-Nonflammable Gas CAS No.: 2551-62-4 1. Description: Sulfur Hexafluoride SF6 Our SF6 adheres to the highest standards for purity and quality, with the lowest moisture content in the industry. SF6 is commonly used by utilities, as well as in commercial applications. Concorde also offers SF6 gas for industrial uses. Concorde filters its Sulfur Hexafluoride with a unique purification system using our proprietary chemical and SF6 Gas - Concorde Gas manufacturing processes, tailored creates a superior grade SF6 that exceeds the industry standards for SF6.