Marquis reagent — 4-HO-EPT
White · Brown
4-HO-EPT (Eprocin)
Source text (English): brownish
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.
4-ho-ept · 4-HO-EPT (Eprocin) · Eprocin

White · Brown
4-HO-EPT (Eprocin)
Source text (English): brownish
White · Green · Black
4-HO-EPT (Eprocin)
Source text (English): black-green
Yellow · Green
4-HO-EPT (Eprocin)
Source text (English): green
White · Orange · Brown · Black
4-HO-EPT (Eprocin)
Source text (English): brown/black
White · Yellow · Green
4-HO-EPT (Eprocin)
Source text (English): green
No reaction
4-HO-EPT (Eprocin)
Source text (English): no pink color change
White · Blue
4-HO-EPT (Eprocin)
Source text (English): faint blue
White · Orange
4-HO-EPT (Eprocin)
Source text (English): orange
Pink · Green
4-HO-EPT (Eprocin)
Source text (English): pale green
White · Black
4-HO-EPT (Eprocin)
Source text (English): black
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.