Zimmermann reagent — 4-TFMMC
White · Purple
4-TFMMC
Source text (English): dark purple (immediate; unchanged at 5 min)
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-tfmmc

White · Purple
4-TFMMC
Source text (English): dark purple (immediate; unchanged at 5 min)
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.