Ehrlich Reagent Test Kit - Yellow Color Change - Test Results

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.

3-MEC

Ehrlich reagent — 3-MEC

White · Yellow

3-MEC

Source text (English): yellow

4-MPH

Ehrlich reagent — 4-MPH

White · Yellow

4-MPH (Mephenmetrazine)

Source text (English): yellow

Benzocaine

Ehrlich reagent — Benzocaine

White · Yellow · Orange

Benzocaine

Source text (English): orange

Benzocaine — Source text (English): Reagents Robadope, Simon’s, Mecke, Liebermann, Ehrlich, Morris. Orange Ehrlich indicates presence of Procaine or Benzocaine.

Benzocaine — Source text (English): Reagents Robadope, Simon’s, Mecke, Liebermann, Ehrlich, Morris. Orange Ehrlich indicates presence of Procaine or Benzocaine.

Harmala Alkaloids

Ehrlich reagent — Harmala Alkaloids

White · Yellow

Harmaline

Source text (English): yellow

Procaine

Ehrlich reagent — Procaine

White · Yellow · Orange

Procaine

Source text (English): orange

Procaine — Source text (English): Reagents Robadope, Simon’s, Mecke, Liebermann, Ehrlich, Morris. Orange Ehrlich indicates presence of Procaine or Benzocaine.

Procaine — Source text (English): Reagents Robadope, Simon’s, Mecke, Liebermann, Ehrlich, Morris. Orange Ehrlich indicates presence of Procaine or Benzocaine.

Tetracaine

Ehrlich reagent — Tetracaine

White · Yellow

Tetracaine

Source text (English): yellow

Thebaine

Ehrlich reagent — Thebaine

White · Yellow

Thebaine HCl

Source text (English): slow yellow over 5 minutes

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