What does HN mean in Unclassified?
This page is about the meanings of the acronym/abbreviation/shorthand HN in the Miscellaneous field in general and in the Unclassified terminology in particular.
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What does HN mean?
- hydrazoic acid, azoimide, hydrogen azide, HN(noun)
- a colorless explosive liquid that is volatile and poisonous and foul-smelling