Marquis reagent

The Marquis reagent is used as a simple spot-test to identify alkaloids. It is composed of a mixture of formaldehyde and concentrated sulfuric acid which is dripped onto the substance being tested. Different alkaloids produce different colour reactions.

Related Topics:
Alkaloids - Formaldehyde - Sulfuric acid

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It is the primary presumptive test used in Ecstasy testing kits.

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It can also be used to test for such substances as cocaine, methadone, hallucinogens, amphetamines and opiates.

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