氮(dan)(dan)氣(qi)通常被稱(cheng)為惰性氣(qi)體，用(yong)于某些(xie)(xie)惰性氣(qi)氛(fen)中(zhong)(zhong)以(yi)進行(xing)金(jin)屬(shu)處理，并(bing)用(yong)于燈泡中(zhong)(zhong)以(yi)防止產(chan)生電弧，但它不(bu)是化(hua)(hua)學(xue)惰性的(de)。它是動植(zhi)物(wu)生命(ming)中(zhong)(zhong)必不(bu)可(ke)少(shao)的(de)元素(su)，并(bing)且是許(xu)(xu)多有用(yong)化(hua)(hua)合物(wu)的(de)組成(cheng)(cheng)部分(fen)。氮(dan)(dan)與許(xu)(xu)多金(jin)屬(shu)結合形成(cheng)(cheng)硬氮(dan)(dan)化(hua)(hua)物(wu)，可(ke)用(yong)作耐磨金(jin)屬(shu)。鋼(gang)中(zhong)(zhong)的(de)少(shao)量氮(dan)(dan)會(hui)(hui)抑制高溫(wen)下的(de)晶粒生長(chang)，并(bing)且還(huan)會(hui)(hui)提高某些(xie)(xie)鋼(gang)的(de)強度。它也可(ke)用(yong)于在鋼(gang)上產(chan)生堅硬的(de)表面。氮(dan)(dan)氣(qi)可(ke)用(yong)于制造(zao)，，鹽等(deng)；在制造(zao)中(zhong)(zhong)；填充高溫(wen)溫(wen)度計；形成(cheng)(cheng)惰性材料以(yi)保(bao)存材料，用(yong)于干燥(zao)箱(xiang)或手套袋中(zhong)(zhong)。食品冷(leng)凍過程中(zhong)(zhong)的(de)液(ye)氮(dan)(dan)；在實驗室中(zhong)(zhong)作為冷(leng)卻劑。