The Development of CF3I as a Halon Replacement
Abstract
This report summarizes the testing efforts on CF3I as a halon replacement agent; these efforts were supported by the CF3I Ad Hoc Working Group. The Working Group included representatives from the U.S. Air Force, Army, Navy, North Slope oil and gas producers, Pacific Scientific, and West Florida Ordnance. The testing efforts confined the laboratory-scale fire suppression and explosion inertion data, determined key acute toxicological information, assessed global environmental characteristics, identified manufacturing sources for developmental quantities of agent, and determined agent stability and materials compatibility properties. The n-heptane cup-burner concentration was 3.1 percent and the propane inertion concentration at peak flammability was 6.2 percent. The atmospheric lifetime is less than 1 day, the ODP is less than 0.008 and more likely 0.0001, and the 20-year GWP is less than 5 relative to CO2. Toxicological tests showed that CF3I has a low order of acute toxicity with the 15-minute rat LC50 equal to 27.4 percent. The dog cardiac sensitization NOAEL was 0.2 percent and the LOAEL was 0.4 percent. Since the expected design concentration will be in the range of 5 to 7 percent, the cardiotoxicity profile will preclude the use of CF3I for total-flooding applications in normally occupied areas. However, CF3I is still a highly promising replacement for unoccupied areas and streaming applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1994
- Accession Number
- ADA351312
Entities
People
- Douglas S. Dierdorf
- Min R. Corbitt
- Robert E. Tapscott
- Stephanie R. Skaggs
- Ted A. Moore