[Code of Federal Regulations] [Title 9, Volume 1] [Revised as of January 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 9CFR71.12] [Page 187] TITLE 9--ANIMALS AND ANIMAL PRODUCTS CHAPTER I--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE PART 71--GENERAL PROVISIONS--Table of Contents Sec. 71.12 Sodium orthophenylphenate as permitted disinfectant for premises infected with tuberculosis. (a) A permitted brand of sodium orthophenylphenate in a proportion of at least one pound to 12 gallons of water is permitted in tuberculosis eradication work for disinfecting infected premises following the removal of cattle that reacted to the tuberculin test. (b) It is absolutely necessary that the solution be applied at a temperature of 60 deg.F. or over. Whenever the temperature of the building to be disinfected is below 60 deg.F., as indicated by a wall thermometer, the solution shall be heated to 120 deg.F. and higher in very cold weather, to insure effective disinfection.