| LC control no. | sh 85004538 |
|---|---|
| LC classification | QD181.N1 Chemistry TD887.A66 Air pollutant TP223 Manufacture |
| Topical heading | Ammonia |
| Variant(s) | Anhydrous ammonia |
| See also | Alkalies Nitrogen compounds |
| Subject example tracing | Example under Refrigerants |
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