Marquis reagent — bk-Ethyl-K
White · Yellow
bk-Ethyl-K
Source text (English): yellow
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.
bk-ethyl-k

White · Yellow
bk-Ethyl-K
Source text (English): yellow
White · Orange
bk-Ethyl-K
Source text (English): orange
Yellow · Brown
bk-Ethyl-K
Source text (English): dark brown > brown
White · Yellow · Brown
bk-Ethyl-K
Source text (English): yellow > olive
White · Yellow · Green · Brown
bk-Ethyl-K
Source text (English): yellow > green > brown
Brown · Orange
bk-Ethyl-K
Source text (English): orange
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.