[2] Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants.
Methyl red is classed by the IARC in group 3 - unclassified as to carcinogenic potential in humans.
These bacteria are called methyl-red positive and include Escherichia coli and Proteus vulgaris.
Other enterics subsequently use the butylene glycol pathway to metabolize pyruvic acid to neutral end products.
Enterics that subsequently metabolize pyruvic acid to neutral end products lower the pH of the medium to only 6.0.