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topic 658

Treating chrome from anti-tarnish dip for sterling silver


We are using an anti-tarnish solution for sterling silver which contains sodium chromate. Does anyone know of an easy, cost effective way of getting rid of the resulting chrome in the waste? Thank you in advance, David

David Guleserian
- Rhode Island


David, , if you are a one time household generator, you can talk to your local garbage people. My county has a twice a year forgiveness day where they will take noncommercial quantities of nearly anything.

If you are commercial, immediately sign up as a conditional small quantity generator. This allows you to do some treatment to reduce volume. Boil it down to an almost slurry. Pour the cooled material into a heavy plastic lined drum. Label the drum "hazardous waste--satellite accumulation container" and then list the hazardous material in it. You can keep this drum to nearly forever, the requirement is to periodically empty it.

Chromates are oxidizers. These will react with other material when you do not want it to. I would be gun shy of organic material in it. Check the MSDS sheet that you got with it. If you did not get one, call the manufacturer. They have to provide you with one on a timely basis or they can go to jail.

When you eventually ship this of, plan on $300 to 500.

James Watts
- Navarre, Florida


First you have to reduce hexavalent chromium to trivalent with bisulfite in low pH and then to precipitate the trivalent chromium at high PH.

sara michaeli
sara michaeli signature 
Sara Michaeli
chemical process supplier
Tel-Aviv, Israel

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