Marquis reagent — Furanylfentanyl
White · Brown
FU-F (furanyl-fentanyl)
Source text (English): brown
Furanylfentanyl reagent analysis
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.
Furanylfentanyl
furanylfentanyl · FU-F (furanyl-fentanyl) · FU-F
Mecke reagent — Furanylfentanyl
White · Brown · Yellow
FU-F (furanyl-fentanyl)
Source text (English): brown > yellow
Mandelin reagent — Furanylfentanyl
Yellow · Brown
FU-F (furanyl-fentanyl)
Source text (English): light brown
Liebermann reagent — Furanylfentanyl
White · Orange
FU-F (furanyl-fentanyl)
Source text (English): orange
Froehde reagent — Furanylfentanyl
No reaction
FU-F (furanyl-fentanyl)
Source text (English): no color change
Ehrlich reagent — Furanylfentanyl
Orange
FU-F (furanyl-fentanyl)
Source text (English): no / faint orange
Gallic reagent — Furanylfentanyl
No reaction
FU-F (furanyl-fentanyl)
Source text (English): no color change
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.