aqua regia
mixture of nitric acid and hydrochloric acid, in a molar ratio of 1:3
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Summary
aqua regia is a mixture[1]. It ranks in the top 8% of mixture entities by monthly Wikipedia readership (8,742 views/month).[2]
Key Facts
- Canonical SMILES: N+(O)[O-].ClN+(O)[O-].Cl">[3]
- Commons category: Aqua regia[4]
- Has part(s): hydrochloric acid[5], nitric acid[6]
- Described by source: Great Soviet Encyclopedia (1926–1947)[7], Otto's encyclopedia[8], The Domestic Encyclopædia; Or, A Dictionary Of Facts, And Useful Knowledge[9]
- Density: 1.01 gram per cubic centimetre[10]
- Mass: 98.972321 dalton[11]
- Melting point: -42 °C[12]
- Boiling point: 108 °C[13]
- Safety classification and labelling: NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response[14]
Why It Matters
aqua regia has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[15] It is known by 66 alternative names across languages and contexts.[16]