BWT 500B (AFCO 8502) is formulated for use in Process or High Make-up Type Boilers. This product was made specifically for use in boilers exceeding 300 horsepower. This product is acceptable for treating boilers or steam lines where the steam produced may contact edible product in official establishments operating under the Federal meat, poultry, shell egg grading and egg products inspection programs as well as milk and milk products under 21 CFR 173.310.