Marquis reagent — FUB-144
White · Purple
FUB-144
Source text (English): purple
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.
fub-144

White · Purple
FUB-144
Source text (English): purple
White · Yellow
FUB-144
Source text (English): light yellow
Yellow · Blue
FUB-144
Source text (English): blue > dark blue
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.