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Contains: 71.25% Amyl alcohol 23.75% hydrochloric acid
Positive indole reactions with Kovac's will turn pink to red
Does not require a xylene or chloroform extraction as with Ehrlich's reagent
For Testing Indole Production in Indole Broth or Biochemical Strip / Cupule Methods
Kovac's reagent is not for rapid spot indole on filter paper