NH4 or NH 4 or NH-4 may refer to:
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Ammonium
Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged (cationic) polyatomic ion, molecular ion with the chemical formula or . It is formed by the protonation, addition of a proton (a hydrogen nucleu ...
, the cation in chemistry
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National Highway 4 (India)
National Highway 4, or NH 4, is the major highway in the Indian union territory of Andaman and Nicobar Islands. It is 230.7 km in length. This road running from the capital city of Port Blair to Diglipur connects all the major towns of Ferr ...
, new numbering for a National Highway in India
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National Highway 4 (India, old numbering)
Route 4, or Highway 4, may refer to several highways in the following countries:
International
* AH4, Asian Highway 4
* European route E04
* European route E004
* Cairo – Cape Town Highway
Albania
* SH-4 road in Albania from Durrës to Ka ...
, a major National Highway in western and southern India
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New Hampshire Route 4
New Hampshire Route 4 (NH 4) is a state highway located in eastern Strafford County, New Hampshire. Its western terminus is at an intersection with New Hampshire Route 9 and New Hampshire Route 108 in Dover. Its northern terminus is at the M ...
, a short state highway located in eastern Strafford County, New Hampshire, United States
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