氮(dan)氣(qi)通常被稱為惰(duo)性(xing)(xing)氣(qi)體，用(yong)(yong)(yong)于(yu)某些惰(duo)性(xing)(xing)氣(qi)氛中以進行金(jin)屬(shu)處理，并(bing)用(yong)(yong)(yong)于(yu)燈泡(pao)中以防止產生(sheng)電弧，但它不(bu)是化學(xue)惰(duo)性(xing)(xing)的(de)。它是動植物生(sheng)命中必(bi)不(bu)可(ke)少(shao)的(de)元素，并(bing)且(qie)(qie)是許多有用(yong)(yong)(yong)化合物的(de)組成(cheng)部分。氮(dan)與許多金(jin)屬(shu)結合形成(cheng)硬氮(dan)化物，可(ke)用(yong)(yong)(yong)作(zuo)耐磨金(jin)屬(shu)。鋼中的(de)少(shao)量氮(dan)會(hui)抑制(zhi)高溫(wen)(wen)下的(de)晶(jing)粒生(sheng)長，并(bing)且(qie)(qie)還會(hui)提高某些鋼的(de)強度。它也可(ke)用(yong)(yong)(yong)于(yu)在鋼上產生(sheng)堅硬的(de)表面。氮(dan)氣(qi)可(ke)用(yong)(yong)(yong)于(yu)制(zhi)造(zao)(zao)，，鹽等；在制(zhi)造(zao)(zao)中；填充(chong)高溫(wen)(wen)溫(wen)(wen)度計；形成(cheng)惰(duo)性(xing)(xing)材料(liao)以保(bao)存材料(liao)，用(yong)(yong)(yong)于(yu)干燥箱或手套袋中。食(shi)品冷(leng)凍(dong)過程中的(de)液氮(dan)；在實驗室(shi)中作(zuo)為冷(leng)卻劑。