Marquis reagent — Aspirin
White · Pink · Red
Aspirin
Source text (English): pink > deep red
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.
aspirin

White · Pink · Red
Aspirin
Source text (English): pink > deep red
No reaction
Aspirin
Source text (English): no color change
Yellow · Brown · Black
Aspirin
Source text (English): black
White · Brown
Aspirin
Source text (English): light brown
White · Blue · Purple
Aspirin
Source text (English): blue > purple
No reaction
Aspirin
Source text (English): no blue color change
No reaction
Aspirin
Source text (English): no color change
No reaction
Aspirin
Source text (English): no color change
Pink · Green
Aspirin
Source text (English): pale green
No reaction
Aspirin
Source text (English): no color change

Colour swatches are illustrative, not measured colour values or reaction timing. Original reference observations are preserved below each result.