Marquis reagent — Oxycodone
White · Purple
Oxycodone
Source text (English): slow faint 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.
oxycodone

White · Purple
Oxycodone
Source text (English): slow faint purple
White · Yellow · Green
Oxycodone
Source text (English): faint yellow > green
Yellow · Orange · Brown
Oxycodone
Source text (English): orange / brown
White · Brown
Oxycodone
Source text (English): brown spots
White · Yellow
Oxycodone
Source text (English): yellow
No reaction
Oxycodone
Source text (English): no pink color change
Orange · Pink
Oxycodone
Source text (English): Dark pink
No reaction
Oxycodone
Source text (English): no color change
No reaction
Oxycodone
Source text (English): no color change
Pink · Green
Oxycodone
Source text (English): pale green
White · Pink · Purple
Oxycodone
Source text (English): violet / purple


Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.