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
Topics referred to by the same termThis disambiguation page lists articles associated with the same title formed as a letter–number combination.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: