Marquis reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no color change
4F-PVP 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.
4F-PVP
4f-pvp · 4F-aPVP (pfpvp) · 4F-aPVP · pfpvp
Mecke reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no color change
Mandelin reagent — 4F-PVP
Yellow · Black
4F-aPVP (pfpvp)
Source text (English): greyish
Liebermann reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no color change
Froehde reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no color change
Robadope reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no pink color change
Simon's reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no blue color change
Hofmann reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
Source text (English): no color change
Gallic reagent — 4F-PVP
No reaction
4F-aPVP (pfpvp)
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.