reagent is one of many drug
identification reagents. It changes color in the presence of a compound in a predictable fashion and can be used to help infer the potential identity of a compound.
[top]Testing with Mecke reagent
One can apply a few drops of the Mecke 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 Mecke reagent
|Diacetylmorphine HCl || Deep bluish green |
| Dimethoxy-meth HCl || Dark brown |
| Doxepin HCl || Very dark red |
| Dristan powder || Light olive brown |
| Exedrine powder || Dark grayish yellow |
| Hydrocodone tartrate || Dark bluish green |
| LSD || Greenish black |
| Mace5 crystals || Dark grayish olive |
| MDA HCl || Very dark bluish green |
| Mescaline HCl || Moderate olive |
| Morphine monohydrate || Very dark bluish green |
| Nutmeg leaves || Brownish black |
| Opium Powder || Olive black |
| Oxycodone HCl || Moderate olive |
| Propoxyphene HCl || Deep reddish brown |
| Sugar crystals || Brilliant greenish yellow |
[top]Making Mecke reagent
Dissolve 1.0 g of selenious acid in 100 mL of concentrated sulfuric acid.
Danger of the Mecke reagent
1. Selenious acid – OXIDIZER, TOXIC. Highly toxic. Contact with combustible
material may cause fire. Toxic by inhalation, in contact with skin, and if swallowed.
Irritating to eyes, respiratory system, and skin. Target organs: liver, heart. Keep away from combustible material. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Take off immediately all contaminated clothing. Wear suitable protective clothing, gloves, and eye/face protection.
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 Mecke reagent works
This section needs to be written. Please contact NeuroChi if you would like to help.
[top]Compounds tested with Mecke reagent
The following is a list of compounds tested by Drugs
Forum members with the Mecke reagent.
refers to whether or not the compound was verified by a third party lab (ie. GC/MS results confirm).
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  || no || Brown / dark drown || |
|4-FA  || no || Brown || |
|4-FA  || no || Brown || user believes this is 4-FA|
|4-FMA  || no || Dark red / brown at first, green if diluted || user comments this compound is barely active in high doses|
|6-APB  || no || Yellow || user describes this compound as supposedly 6-APB, though very impure|
|JWH-073  || no || yellow > yellow/orange || |
|JWH-081  || no || dark red/brown || |
|JWH-250  || no || bright red || |
|MDPV  || no || Dark red / brown || no rxn to Simons or Robadope, implies tertiary amine (MDPV)|
|MDPV  || no || Dark brown || no rxn to Simons or Robadope, implies tertiary amine (MDPV)|
|Methylone  || no || Orange || |
|Naphyrone  || no || Dark red / brown || rxn to Simons, implies secondary amine (not Naphyrone)|