Marquis reagent — Propoxyphene
White · Brown · Purple
Propoxyphene HCl
Source text (English): dark brown-violet
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.
propoxyphene · Propoxyphene HCl

White · Brown · Purple
Propoxyphene HCl
Source text (English): dark brown-violet
White · Red · Brown
Propoxyphene HCl
Source text (English): reddish brown
Yellow · Brown
Propoxyphene HCl
Source text (English): dark brown
White · Red
Propoxyphene HCl
Source text (English): dark greyish red or brown
Pink · Blue
Propoxyphene HCl
Source text (English): blue
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.