Marquis reagent — bk-2C-B
White · Orange
bk-2C-B
Source text (English): bright orange
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-2c-b

White · Orange
bk-2C-B
Source text (English): bright orange
White · Orange · Red
bk-2C-B
Source text (English): orange
Yellow · Orange · Red
bk-2C-B
Source text (English): Orange / Red
White · Orange
bk-2C-B
Source text (English): orange
White · Orange
bk-2C-B
Source text (English): orange
Orange · Pink · Purple
bk-2C-B
Source text (English): no color change → Slight darkening purple
No reaction
bk-2C-B
Source text (English): no color change
No reaction
bk-2C-B
Source text (English): no color change
Brown · Orange
bk-2C-B
Source text (English): orange
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.