File:(NH4)2Cr2O7.JPG · Wikimedia Commons · See Wikimedia Commons
Chemical data
- Formula
- Cr2H8N2O7
- Molecular weight
- 252.07 g/mol
- IUPAC name
- diazanium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium
- SMILES
- [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]
- InChIKey
- JOSWYUNQBRPBDN-UHFFFAOYSA-P
- Polar surface area
- 126 Ų
- H-bond donors
- 2
- H-bond acceptors
- 7
- Formal charge
- 0
via PubChem
Wikidata facts
- Subclass of
- chemical compound
- Has part
- nitrogen
- Mass
- 251.914
- Image
- Ammonium-dichromate-sample.jpg
Show 8 more facts
- color
- orange
- canonical SMILES
- [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]
- chemical formula
- Cr₂H₈N₂O₇
- Commons category
- Ammonium dichromate
- safety classification and labelling
- Regulation (EC) No. 1272/2008
- decomposition point
- 180
- melting point
- 180
- solubility
- 360
Sources (2)
via Wikidata · CC0
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Encyclopedic overview
Ammonium dichromate is an inorganic compound with the formula (NH4)2Cr2O7. In this compound, as in all chromates and dichromates, chromium is in a +6 oxidation state, commonly known as hexavalent chromium. It is a salt consisting of ammonium ions and dichromate ions.
Ammonium dichromate is used in demonstrations of tabletop "volcanoes". However, this demonstration has become unpopular due to concerns about the compound's carcinogenic nature. It has been used in pyrotechnics and in the early days of photography. It is also used in holography.
Excerpted from Wikipedia’s “ammonium dichromate” article, available under the CC BY-SA 4.0 licence.