Amido Black is a protein stain that is used to develop or enhance blood-contaminated latent prints, footwear and tire track impressions. Amido Black is a ready-to-use pre-mixed liquid. Catalog #202B.

Also, available in a liter - Catalog #202. 

HAZARDOUS: This product has been designated a hazardous or flammable substance by the Department of Transportation. The D.O.T. requires that a hazardous material surcharge be assessed for each package shipped. This cost is currently $25.00 per package plus normal freight charge. A $25 charge may be added for each box containing a hazardous substance at the time of shipment.