Opium reagent analysis

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.

Opium

opium

Reagent colour reaction chart for Opium
Documented reagent colour reactions for Opium.

Marquis reagent — Opium

White · Purple

Opium

Source text (English): reddish brown or purple

Mecke reagent — Opium

White · Green · Black

Opium

Source text (English): green - black

Mandelin reagent — Opium

Yellow · Brown

Opium

Source text (English): dark brown

Froehde reagent — Opium

White · Brown

Opium

Source text (English): brownish black

Ehrlich reagent — Opium

White · Pink

Opium

Source text (English): slow pink over 5-10 minutes

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

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