Marquis reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
4-FA 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.
4-FA
4-fa · 4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Mecke reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
Mandelin reagent — 4-FA
Yellow · Orange · Red · Brown · Yellow
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): short reddish
Liebermann reagent — 4-FA
White · Orange · Red
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): reddish-orange
Froehde reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
Simon's reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): slow brown
Ehrlich reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
Hofmann reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
Scott reagent — 4-FA
No reaction
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): no color change
Morris reagent — 4-FA
Pink · Green
4-FA (4-FMP, PAL-303, Flux, 4-Fluoroamphetamine).
Source text (English): pale green
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.