Mecke reagent

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The Mecke reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of selenious acid and concentrated sulfuric acid,[1] which is dripped onto the substance being tested.

The United States Department of Justice method for producing the reagent is the addition of 100 mL of concentrated (95–98%) sulfuric acid to 1 g of selenious acid.[2]

Final colors produced by Mecke Reagent with various substances[2]
Substance Color
Chlorpromazine HCl Blackish red
Codeine Very dark bluish green
Diacetylmorphine HCl (Heroin) Deep bluish green
Dimethoxy-meth HCl Dark brown
Doxepin HCl Very dark red
Dristan Light olive brown
Exedrine Dark greyish yellow
LSD Greenish black
Mace Dark greyish olive
Methylenedioxyamphetamine HCl (MDA) Very dark bluish green
Mescaline HCl Moderate olive
Morphine monohydrate Very dark bluish green
Opium Olive black
Oxycodone HCl Moderate olive
Propoxyphene HCl Deep reddish brown
Sugar Brilliant greenish yellow

See also[edit]

References[edit]

  1. ^ "Mecke Reagent Testing Kit (Red Label)". Dancesafe. Retrieved 2012-01-26. 
  2. ^ a b "Color Test Reagents/Kits for Preliminary Identification of Drugs of Abuse" (PDF). Law Enforcement and Corrections Standards and Testing Program. July 2000. Retrieved 2011-07-24. 

External links[edit]