Formalin 40 is a formaldehyde solution containing: 40% (by volume) Formaldehyde (36.6% by weight) and 7.3% by weight Methanol. Formalin 40 is 5% more concentrated than any other formaldehyde solution on the market and provides a cost effective disinfectant and steriliser for use on farm. Suitable for a number of different applications, Formalin 40 is ideal for use in footbaths as a disinfectant and lameness preventative.