Laboratory Trials

Laboratory trials conducted with QuestPharma in Spain. Different acid formulations were tested on Salmonella Choleraesuis and Fusarium Verticiloides. Clear benefits with SoftAcid® were observed.

The figures below show the results of minimum inhibitory concentration (MIC) tests with different acidifiers.


  • SoftAcid V is far more efficient than ammonium formate.


  • SoftAcid P+ is very efficient on fusarium, even at low inclusion rate (0.5 kg/t). 
  • Propionic acid is less efficient than SoftAcid P+ in inhibiting fusarium (1 kg/t to achieve the same effect).
  • Ammonium propionate requires an even higher dose (2.5 kg/t) than propionic acid to achieve the same results.

Propionic acid has its strongest antifungal activity in the range between pH 4.5 to 5.0. As a result, pH in the sample treated with pure propionic acid is too low, and a higher MIC can be observed. Similarly, the pH in the sample treated with propionate is too high, resulting in the same drop in efficiency. 

Contact me about SoftAcid® Laboratory Trials