Indicator and stain.
Dithizone is widely used as an indicator for trace amounts of metals, often referred to as colorimetric microdetermination.
Forensics Lab Supply Number 0110305.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
The quantity of 1 gram is offered for those who require only the least amount of an item, especially for mixing up a stock solution. If a greater amount is required, a lower price per gram can be worked out, depending upon available supply. Place an order for the number of grams that are needed, and add a note to contact you by email before processing an order so that a price may be agreed upon.
from a AGI/GeoRef Citation:
"A sensitive field test for heavy metals in water" by Lyman Coleman Huff
A semiquantitative colorimetric analytical method using dithizone to detect traces of heavy metals in natural water is described. Although reagents of exceptional purity are required, only simple equipment is needed and the test can be made in a few minutes in the field. A combined mixed color and mono color technique makes the test suitable for a wide range of concentrations. The test is very sensitive; as little as 0.01 part per million of either copper, lead, zinc or any combination of the three metals can be detected readily.The dithizone test permits rapid field identification of drainage elements which contain significant concentrations of heavy metals. An example is given showing how the test can be used to trace the heavy metal content of a drainage system back to its source. It is possible that, under favorable conditions, the field test may facilitate prospecting by detecting metals discharged by the weathering of hidden ore bodies. However, until the method receives further investigation, it would be premature to predict its value.