Formalin is a known irritant and suspected carcinogen.  It can be effective in limited applications.  Tests have proven formalin ineffective at concentrations below 2% or operating temperatures below 10 degrees Celsius.

A solution of 12 litres of formalin in a 200 litre footbath will result in a 6%.  Studies show a typical  formalin footbath is effective to treat only 150 or fewer cows per charge.

Evaporation alone will reduce the solution to 2% concentration in 24—48 hours.  Manure contamination and use of solution  will further reduce efficacy. 

 

Dangers of Formalin