Marquis reagent — 4Cl-PVP
White · Brown
4Cl-PVP
Source text (English): brownish
4Cl-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.
4Cl-PVP
4cl-pvp
Mecke reagent — 4Cl-PVP
White · Black
4Cl-PVP
Source text (English): grey (long)
Mandelin reagent — 4Cl-PVP
Yellow · Brown
4Cl-PVP
Source text (English): brownish
Liebermann reagent — 4Cl-PVP
White · Yellow
4Cl-PVP
Source text (English): yellowish
Froehde reagent — 4Cl-PVP
White · Brown
4Cl-PVP
Source text (English): brownish
Gallic reagent — 4Cl-PVP
No reaction
4Cl-PVP
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.