a colorless crystalline compound, soluble in water; used as a reagent to determine the presence of such substances as lignin, narceine, and nitrous acid
With a pipette, transfer 5 ml of the clarified solution to a test tube. Add 1 ml of a 10% solution of crystalline guaiacol and 96% ethanol and 1 ml of 1% H2O2 (hydrogen peroxide).
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