Specifications
"All firefighting products must be evaluated and approved by WFCS prior to use on Federal lands. The process to fully evaluate a single product can take 18 to 24 months."
The specifications or specs, define the standards that wildland fire chemical products must meet to be placed on the Qualified Product List (QPL). Each specification is updated periodically. The current specification for each type of chemical is below:
https://www.fs.usda.gov/rm/fire/wfcs/specification.php