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topic 11703

Sulfamic acid disposal


I have a small quantity of crystaline sulfamic acid (10 lbs) that I would like to neutralize and dispose of. I see on the MSDS that Lime can be used to neutralize spills. What is a safe way to neutralize this material when it is in dry form?

Joy N [last name deleted for privacy by Editor]
- Shelby Township, Michigan


I don't think that's the right way to do it, Ms. Neumann; I think you have to add water to the acid crystals before beginning the neutralization process.

Ted Mooney, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey


But M(SO3NH2)2.xH2O contains ammonia, and that is usually regulated, I believe at around 100 or 200 mg/liter; if not ammonia, there is usually a Kjeldahl nitrogen limit, so I don't think it will work in most jurisdictions.

tom pullizi signature
Tom Pullizzi
Falls Township, Pennsylvania

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