Liebermann reagent — 1,4-Butanediol
White · Purple · Blue
1,4-Butanediol (BDO)
Source text (English): purple-blue
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.
White · Purple · Blue
1,4-Butanediol (BDO)
Source text (English): purple-blue
White · Blue · Black
Hydrafinil
Source text (English): dark blue / black sample
White · Blue · Black
MDE
Source text (English): blue
White · Blue · Black
MDEA (MDE, Eve)
Source text (English): blue
White · Brown · Blue
MPA (Methiopropamine)
Source text (English): turquoise blue
White · Blue · Black
Morphine (MS-Contin, Oramorph, Zomorph, Sevredol, Duramorph)
Source text (English): blue / black
White · Blue
Yohimbine
Source text (English): blue
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.