Marquis reagent — Methadone
White · Pink · Purple
Methadone (Dolophine, Methadose)
Source text (English): yellowish pink > 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.
methadone · Methadone (Dolophine, Methadose) · Dolophine · Methadose

White · Pink · Purple
Methadone (Dolophine, Methadose)
Source text (English): yellowish pink > violet
White · Yellow
Methadone (Dolophine, Methadose)
Source text (English): no color change
Yellow · Green · Blue
Methadone (Dolophine, Methadose)
Source text (English): green / green > blue
White · Yellow · Orange · Brown
Methadone (Dolophine, Methadose)
Source text (English): yellowish / brownish
White · Blue
Methadone (Dolophine, Methadose)
Source text (English): blue
No reaction
Methadone (Dolophine, Methadose)
Source text (English): no blue color change
No reaction
Methadone (Dolophine, Methadose)
Source text (English): no color change
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.