Vulcan Fast Red Chromogen Kit 2, part of an immunohistochemistry (IHC) procedure using an alkaline phosphatase (AP) detection system. Catalog numbers FR805-5L and FR805S
Chromogen failed to develop due to a stability issue caused by environmental factors with a raw material in the Vulcan Fast Red Buffer.
CA, VT, KY, LA, OR, RI, GA, IL, MA, TX, KS, FL, Japan, and Germany
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-2360-2018