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[mass noun] A white crystalline solid which slowly decomposes, giving off ammonia, and is an ingredient of sal volatile.
- ‘Other alkalis, such as ammonium carbonate, sodium tribasic phosphate, acetone, and various glycols (such as triethanolamine, pH 8 at 1% dilution), are sometimes used.’
- ‘Finally, if ammonium carbonate is placed in water, the weak base ammonium carbonate and weak acid carbonic acid are produced.’
- ‘Standing urine forms ammonium carbonate which is strongly alkaline.’
- ‘This substance is known today as ammonium carbonate.’
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