• Remotox is a strong yet relatively inexpensive metal precipitant.
  • Its residues are inert and non-toxic.
  • Unlike carbamate and carbonate salts, it does not contain carbon disulfide.
  • Compared to other sulfides, it provides more stability in acidic medium.
  • Remotox has been tested to maintain its effectiveness for a minimum of one year.
  • No need to dissolve prior to use as compared to solid material.
  • NSF approved for drinking water treatment.
  • Not regulated by the Department of Transportation.


When mixed with water, Remotox decomposes to form bisulfide, aqueous hydrogen sulfide and other sulfur compounds. Most heavy metal ions are precipitated as metal sulfides by these breakdown products. See Calcium Polysulfide for Treatment of Heavy Metals and Cyanide. Metal sulfides are much less soluble than metal hydroxides. Metal hydroxides change solubility with changes in pH. Metal sulfides remain insoluble within a wide pH range. 


In the case of chromium, Remotox reduces hexavalent chromium to trivalent state which then precipitates as chromium hydroxide in a one-step reaction; therefore, no need for bisulfite, metabisulfite, sulfur dioxide or sulfuric acid. 


While effective treatment can be achieved over a wide pH range, best results are typically obtained within water system pH 7-10. See pH Guidelines for Treatment of Soluble Metal Streams. Ensuring adequate contact time and thorough mixing is critical to successful treatment. Dewatering the resulting precipitate can be expedited by employing an anionic flocculant. 


For additional information, heavy-metal removal studies, samples or assistance, please contact us at 623-328-5175 or by email at info@grauschemicals.com.

REMOTOX® Calcium Polysulfide for removing copper, zinc, lead, chromium, cadmium, cyanide and other metals from process wastewater.

Wastewater Treatment

Many industries, including metal finishing, printed circuit board manufacturing, food processing, mining, milling and smelting operations, produce wastewater streams containing significant amounts of metals. 


Remotox® is commonly used for cost-effective removal of  heavy metal ions and other organic compounds from various wastewater sources.

Remotox® is a calcium polysulfide liquid solution consisting of multiple sulfur anions that strongly bond to heavy metals in water.

Application Advantages:

Heavy Metal Precipitation by REMOTOX Calcium Polysulfide.

Calcium Polysulfide effectively removes hexavalent chromium from wastewater, groundwater, and soil

Calcium Polysulfide dosage guidelines available upon request.

Calcium Polysulfide application guidelines for precipitation of heavy metals in process wastewater.

Many industries, including metal finishing, printed circuit board manufacturing, food processing and mining operations, produce waste streams containing significant amounts of metals.


Remotox® is commonly used for cost-effective removal of heavy metal ions and other inorganic compounds from various wastewater sources.

Product Features: