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 Mandelin reagent
One can apply a few drops of the Mandelin 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 Mandelin reagent
| Dimethoxy-meth HCl || Dark olive brown |
| Doxepin HCl || Dark reddish brown |
| Dristan powder|| Grayish olive |
| Exedrine powder || Dark olive |
| MDA HCl || Bluish black |
| Mescaline HCl || Dark yellowish brown |
| Methadone || Dark grayish blue |
| Methaqualone || Very orange yellow |
| Methylphenidate || Brilliant orange yellow |
| Morphine monohydrate || Dark grayish reddish Brown|
| Opium || Dark brown |
| Oxycodone HCl || Dark greenish yellow |
| Procaine HCl || Deep orange |
| Propoxyphene HCl || Dark reddish brown |
| Quinine HCl || Deep greenish yellow |
| Salt crystals|| Strong orange |
| || |
[top]Making Mandelin reagent
Dissolve 1.0 g of ammonium vanadate in 100 mL of concentrated sulfuric acid.
Danger of the Mandelin reagent
1. Ammonium vanadate - TOXIC. Toxic by inhalation, in contact with skin, and if swallowed. Irritating to eyes and respiratory system. Risk of serious damage to eyes. Possible risk of irreversible effects. Possiblem utagen. In case of accident or if you feel unwell, seek medical advice immediately. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 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 Mandelin reagent works
This section needs to be written. Please contact NeuroChi if you would like to help.
[top]Compounds tested with Mandelin 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 || Yellow/orange || |
|4-FA  || no || Light yellow/green || |
|4-FA  || no || Yellow/green || user believes this is 4-FA|
|4-FMA  || no || Yellow/green || user comments this compound is barely active in high doses|
|6-APB  || no || Dark green || user describes this compound as supposedly 6-APB, though very impure|
|JWH-073  || no || yellow > green || |
|JWH-081  || no || orange || |
|JWH-250  || no || bright red || |
|MDPV  || no || Green then dark orange || no rxn to Simons or Robadope, implies tertiary amine (MDPV)|
|MDPV  || no || Orange* || no rxn to Simons or Robadope, implies tertiary amine (MDPV)|
|Methylone  || no || Yellow || |
|Naphyrone  || no || Yellow then orange || rxn to Simons, implies secondary amine (not Naphyrone)|