title: NH4
text: # NH4
  
  NH4 or NH 4 or NH-4 may refer to:
  
  * Ammonium, the cation $NH^+$ $_4$ in chemistry
  * National Highway 4 (India), new numbering for a National Highway in India
  * National Highway 4 (India, old numbering), a major National Highway in western and southern India
  * New Hampshire Route 4, a short state highway located in eastern Strafford County, New Hampshire, United States
  