NH2
NH2 or similar may refer to:
- Azanide (chemical formula NH−
2) - Amino radical (chemical formula NH•
2) - Nitrenium ion (chemical formula NH+
2) - Primary amide group (chemical formula -NH
2) - National Harbor–Alexandria Line (Route NH2), a WMATA bus line between Alexandria, Virginia and Prince George's County, Maryland
- National Highway 2 (India)
- New Hampshire's 2nd congressional district
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