盐酸羟胺，化学式NH₂OH·HCl。

无色单斜结晶，易溶于水，溶于乙醇、甘油，不溶于乙醚。吸湿性强，受潮后逐渐分解。加热至151°C以上亦分解。

Hydroxylammonium chloride is the hydrochloric acid salt of hydroxylamine. Hydroxylamine is a biological intermediate in the nitrification (biological oxidation of ammonia with oxygen into nitrite) and in the anammox (biological oxidation of nitrite and ammonium into dinitrogen gas) which are important in the nitrogen cycle in soil and in wastewater treatment plants.