[top]Testing with Marquis Reagent
One can apply a few drops of the Marquis reagent to a sample of the compound on glass or ceramic. Be careful with test regents, they can be corrosive. Handle in a well ventilated area, gasses can emerge from the reaction.
Observe the color change. Compare with chart below.
[top]Known Color Changes with Marquis Reagent
| Aspirin powder | Deep red |
| Benzphetamine HCl | Deep reddish brown |
| Chlorpromazine HCl | Deep purplish red |
| Codeine | Very dark purple |
| d-Amphetamine HCl | to Strong reddish orange to Dark reddish brown |
| d-Methamphetamine HCl | Deep reddish orange to Dark reddish brown |
| Diacetylmorphine HCl | Deep purplish red |
| Dimethoxy-meth HCl | Moderate olive |
| Doxepin HCl | Blackish red |
| Dristan powder | Dark grayish red |
| Exedrine powder | Dark red |
| LSD | Olive black |
| MDA HCl | Black |
| Meperidine HCl | Deep brown |
| Mescaline HCl | Strong orange |
| Methadone | Light yellowish pink |
| Methylphenidate | Moderate orange yellow |
| Morphine monohydrate | Very deep reddish purple |
| Opium Powder | Dark grayish reddish Brown |
| Oxycodone HCl | Pale violet |
| Propoxyphene HCl | Blackish purple |
| Sugar crystals | Dark brown |
| | |
[top]Making Marquis reagent
Carefully add 100 mL of concentrated sulfuric acid to 5 mL of 40 percent
formaldehyde (v:v, formaldehyde:water).
[top]Danger of the Marquis Reagent
1. Formaldehyde - TOXIC. May cause cancer. May cause heritable genetic damage. Toxic by inhalation, in contact with skin, and if swallowed. Causes burns. May cause sensitization by inhalation and skin contact. Readily absorbed through skin.L achrymator.Combustible. Target organs: eyes, kidneys. Wear suitable protective clothing and gloves.
2. Sulfuric acid - OXIDIZER, ACID, TOXIC, CORROSIVE. Liquid and mist
cause severe burns to all body tissue. May be fatal if swallowed. Harmful if inhaled.
Inhalation may case lung damage. Do not get liquid in eyes, on skin, or clothing. Wash thoroughly after handling. Avoid breathing vapors. Use with adequate ventilation. Do not add water to contents while in container because of violent reaction. Store in tightly closed container. Wear suitable protective clothing and gloves.
[top]How the Marquis Reagent Works
This section needs to be written. Please contact NeuroChi if you would like to help.
[top]Compounds tested with Marquis Reagent
The following is a list of compounds tested by
Drugs Forum members with the Marquis reagent.
Verified refers to whether or not the compound was verified by a third party lab (ie. GC/MS results confirm).
Color refers to the best description of the color either by image upload or user(s) description. Please see the thread linked for more information.
| Compound | Verified? | Color | Other notes |
|---|
| 4-FA [1] | no | Bright Yellow | |
| 4-FA [2] | no | Bright Yellow | |
| 4-FA [3] | no | Light Orange | user believes this is 4-FA |
| 4-FMA [1] | no | Yellow/ dark yellow. Spot of pink. | user comments this compound is barely active in high doses |
| 6-APB [1] | no | Dark Brown | user describes this compound as supposedly 6-APB, though very impure |
| 6-APB [2] | no | Purple | Reacts as should with EZ test MCPP test which also tests for 6-APB |
| JWH-073 [1] | no | dark brown | |
| JWH-081 [1] | no | orange > orange/green/brown | |
| JWH-250 [1] | no | red/orange | |
| MDPV [1] | no | Orange | no rxn to Simons or Robadope, implies tertiary amine (MDPV) |
| MDPV [2] | no | Orange | no rxn to Simons or Robadope, implies tertiary amine (MDPV) |
| Methylone [1] | no | Yellow | consistent with EZ Test results |
| Methylone [2] | no | Orange | consistant with EZ test result |
| Butylone [1] | no | Orange | consistant with EZ test results |
| Mephedrone [1] | no | pale yellow | pure Mephedrone supposedly show no reaction |
| Mephedrone [2] | no | pale yellow | pure Mephedrone supposedly shows no reaction |
| Naphyrone [1] | no | Bright Orange | rxn to Simons, implies secondary amine (not Naphyrone) |
| Benzo-Fury Pellet [1] | no | Purple | |
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