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Scott Reagent 

Final colours produced by Scott Reagent with various substances (go to Testing for more info)

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Use the Search facility to see results easier:

Just use ~3 characters to define colour so you get all colour responses e.g. blu for blue/bluish etc. Type "No reaction" if no reaction is seen. Use some of the tips on the Overview/Testing page to achieve better colour recognition. 

Note:  a "no reaction" (listed in charts) is a positive response and hence can be used to assist in identification, but only if stated on chart. 

What is a no-reaction?  This is when a substance does not react to the reagent (there is no change).  If you’re testing, for example, suspected ketamine with the Marquis reagent, there should be no reaction.  This can be very helpful as many substances that can be mixed with ketamine will react with Marquis such as methampetamine and/or other adulterants.  If you observe a reaction of any kind, you will know that some other substance is present in the sample.  This same testing observation can be used with other test kits / substances from the identification chart and can be an effective tool for identifying an adulterated substance.