Froehde reagent — 1-[(2-Chlorophenyl)(methylimino)methyl]cyclopentanol
White · Blue
Ketamine Precursor A
Source text (English): bright blue
Froehde Reagent Test Kit - Blue Color Change - Test Results
There are more substances than colors, so to increase analysis precision use a kit with multiple reagents. Exact color of a reaction depends on adulteration, quantity, lighting, temperature, exposure to air, storage, as well as reagent quality and degradation. Positive or negative result does not indicate if a substance is safe. No substance is 100% safe.
1-[(2-Chlorophenyl)(methylimino)methyl]cyclopentanol
2-bromo-3-methylpropiophenone
Froehde reagent — 2-bromo-3-methylpropiophenone
White · Blue
2-br-3-methylpropiophenone (Precursor)
Source text (English): blue
2-MAPB
Froehde reagent — 2-MAPB
White · Black · Blue
2-MAPB
Source text (English): dark blue
5-MBPB
Froehde reagent — 5-MBPB
White · Blue
5-MBPB
Source text (English): blue
5F-PY-PICA
Froehde reagent — 5F-PY-PICA
White · Yellow · Green · Blue
5F-PY-PICA
Source text (English): olive > olive blue
Alpha-meprodine
Froehde reagent — Alpha-meprodine
White · Blue · Black
Alpha-meprodine
Source text (English): blue-grey
Alphaprodine
Froehde reagent — Alphaprodine
White · Blue · Black
Alphaprodine
Source text (English): blue-grey
Aspirin
Froehde reagent — Aspirin
White · Blue · Purple
Aspirin
Source text (English): blue > purple
Beta-meprodine
Froehde reagent — Beta-meprodine
White · Blue · Black
Beta-meprodine
Source text (English): blue-grey
Betaprodine
Froehde reagent — Betaprodine
White · Blue · Black
Betaprodine
Source text (English): blue-grey
Chlorodehydromethyltestosterone
Froehde reagent — Chlorodehydromethyltestosterone
White · Blue · Purple
Chlorodehydromethyltestosterone
Source text (English): blue/purple
Diethyl-thiambutene
Froehde reagent — Diethyl-thiambutene
White · Green · Blue
Diethyl-thiambutene
Source text (English): green - green-blue
Dimethyl-thiambutene
Froehde reagent — Dimethyl-thiambutene
White · Green · Blue
Dimethyl-thiambutene
Source text (English): green - green-blue
Dipipanone
Froehde reagent — Dipipanone
White · Green · Blue
Dipipanone
Source text (English): deep green-blue
Dristan
Froehde reagent — Dristan
White · Green · Blue
Dristan
Source text (English): light blueish green
Ethylmethyl-thiambutene
Froehde reagent — Ethylmethyl-thiambutene
White · Green · Blue
Ethylmethyl-thiambutene
Source text (English): green - green-blue
Ethylmorphine
Froehde reagent — Ethylmorphine
White · Yellow · Green · Blue
Ethylmorphine (Codethyline, Dionine)
Source text (English): yellow > green > blue
Exedrine
Froehde reagent — Exedrine
White · Blue
Exedrine
Source text (English): brilliant blue
Homoveratrylamine
Froehde reagent — Homoveratrylamine
White · Green · Blue
Homoveratrylamine
Source text (English): light blue
HXE
Froehde reagent — HXE
White · Blue · White
HXE
Source text (English): dissapearing blueish
Hydrafinil
Froehde reagent — Hydrafinil
White · Blue · Black
Hydrafinil
Source text (English): dark blue / black sample
Hydromorphine
Froehde reagent — Hydromorphine
White · Blue · Black
Hydromorphine
Source text (English): dark blue > grey
Hydromorphone
Froehde reagent — Hydromorphone
White · Blue · Purple · Black
Hydromorphone (Dilaudid)
Source text (English): blue > purple / grey
Isomethadone
Froehde reagent — Isomethadone
White · Brown · Purple · Blue
Isomethadone
Source text (English): brown-purple - violet-blue
Ketobemidone
Froehde reagent — Ketobemidone
White · Blue · Black
Ketobemidone
Source text (English): blue-grey
Mde
Froehde reagent — MDE
White · Yellow · Blue · Black
MDE
Source text (English): Yellow/Green > Dark Blue
Froehde reagent — MDEA (MDE, Eve)
White · Yellow · Blue · Black
MDEA (MDE, Eve)
Source text (English): Yellow/Green > Dark Blue
Methadone
Froehde reagent — Methadone
White · Blue
Methadone (Dolophine, Methadose)
Source text (English): blue
MMDA
Froehde reagent — MMDA
White · Blue
MMDA
Source text (English): Blue > Dark Blue
N-Desethylisotonitazene
Froehde reagent — N-Desethylisotonitazene
White · Blue
N-Desethylisotonitazene
Source text (English): light blue
O-DSMT
Froehde reagent — O-DSMT
White · Blue · Yellow
O-DSMT
Source text (English): blue > olive
Oxymorphone
Froehde reagent — Oxymorphone
White · Blue · Purple
Oxymorphone
Source text (English): blue > violet
Paracetamol
Froehde reagent — Paracetamol
White · Green · Blue
Paracetamol (Acetaminophen)
Source text (English): blueish / teal
Pentazocine
Froehde reagent — Pentazocine
White · Blue
Pentazocine
Source text (English): blue
Phenadoxone
Froehde reagent — Phenadoxone
White · Green · Blue
Phenadoxone
Source text (English): deep green-blue
Phenoxymethylpenicillin
Froehde reagent — Phenoxymethylpenicillin
White · Blue
Phenoxymethylpenicillin
Source text (English): blue
Tadalafil
Froehde reagent — Tadalafil
White · Blue
Cialis / Tadalafil
Source text (English): dark blue
Tapentadol
Froehde reagent — Tapentadol
White · Blue
Tapentadol (Nucynta, Palexia, Yantil, Yantil SR)
Source text (English): blue
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.