Marquis reagent — 2-FEA
White · Yellow · Orange
2-FEA (2-fluoroethylamphetamine)
Source text (English): yellow/orange
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.
2-fea · 2-FEA (2-fluoroethylamphetamine) · 2-fluoroethylamphetamine

White · Yellow · Orange
2-FEA (2-fluoroethylamphetamine)
Source text (English): yellow/orange
No reaction
2-FEA (2-fluoroethylamphetamine)
Source text (English): no color change
Yellow · Brown
2-FEA (2-fluoroethylamphetamine)
Source text (English): brownish
White · Orange
2-FEA (2-fluoroethylamphetamine)
Source text (English): orange
No reaction
2-FEA (2-fluoroethylamphetamine)
Source text (English): no color change
No reaction
2-FEA (2-fluoroethylamphetamine)
Source text (English): no pink color change
White · Purple
2-FEA (2-fluoroethylamphetamine)
Source text (English): purple/blue
No reaction
2-FEA (2-fluoroethylamphetamine)
Source text (English): no color change
No reaction
2-FEA (2-fluoroethylamphetamine)
Source text (English): no color change
Pink · Green
2-FEA (2-fluoroethylamphetamine)
Source text (English): pale green
White · Yellow
2-FEA (2-fluoroethylamphetamine)
Source text (English): no change / faint yellow
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.