Marquis reagent — Doxepin
White · Red
Doxepin HCl
Source text (English): blackish red
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.
doxepin · Doxepin HCl

White · Red
Doxepin HCl
Source text (English): blackish red
White · Red
Doxepin HCl
Source text (English): very dark red
Yellow · Red
Doxepin HCl
Source text (English): dark reddish brown
White · Red
Doxepin HCl
Source text (English): deep reddish brown
Pink · Blue · Green
Doxepin HCl
Source text (English): cyan / turquoise blue
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.