Marquis reagent — 2-MAPB
White · Black
2-MAPB
Source text (English): black
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.
2-mapb

White · Black
2-MAPB
Source text (English): black
White · Brown · Black
2-MAPB
Source text (English): browish > black
Yellow · Green · Black
2-MAPB
Source text (English): black
White · Brown · Black
2-MAPB
Source text (English): black
White · Black · Blue
2-MAPB
Source text (English): dark blue
Brown
2-MAPB
Source text (English): brown
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.