A solution of hydrogen peroxide with ferrous iron, used as a catalyst to oxidize contaminants or waste waters.

A spot test used to identify various recreational drugs, etc.

plural of Marquis reagent

(chemistry) an alkyl or aryl magnesium halide, used in the Grignard reaction to form substituted alcohols; they are formed from alkyl or aryl halides and metallic magnesium

(chemistry) A buffered solution of copper sulphate which changes from blue to red in the presence of a reducing sugar.

A chemical reagent, an aqueous solution of chloral hydrate, potassium iodide and iodine, used in identifying fungi.

A mixture of molybdic acid or sodium molybdate and hot, concentrated sulfuric acid, used to identify opioids and other compounds.

A mixture of potassium nitrite and concentrated sulfuric acid, used to test for cocaine, morphine, PMA and PMMA.

A reagent made from paradimethylaminobenzaldehyde, ethanol and concentrated hydrochloric acid, primarily used to identify indoles.

dinitrofluorobenzene