Froehde reagent — Promethazine
White · Purple
Promethazine
Source text (English): purple red
Promethazine 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.
Promethazine
promethazine
Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.