Ammonium dichromate
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| Ammonium dichromate | |
|---|---|
| Image:(NH4)2Cr2O7.JPG | |
| General | |
| Systematic name | ? |
| Other names | Ammonium Pyrochromate |
| Molecular formula | (NH4)2Cr2O7 |
| SMILES | ? |
| Molar mass | 252.07 g/mol |
| Appearance | Orange crystalline solid |
| CAS number | 7789-09-5 |
| Properties | |
| Density and phase | 2.15 g/cm3, ? |
| Solubility in water | 36.4 g/100 ml (20°C) |
| Melting point | 180°C (? K) |
| Boiling point | NA °C (? K) |
| Acidity (pKa) | ? |
| Basicity (pKb) | ? |
| Chiral rotation [α]D | ?° |
| Viscosity | ? cP at ?°C |
| Structure | |
| Molecular shape | ? |
| Coordination geometry | ? |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | ? |
| NFPA 704 | |
| Flash point | ?°C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | ? |
| Related ? | ? |
| Related compounds | ? |
| Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa) Infobox disclaimer and references | |
Ammonium dichromate, (NH4)2Cr2O7, sometimes known as Vesuvian Fire, is a chemical compound that was used as an oxidizer in early photography and pyrotechnics, and in the formation of tabletop "volcanoes".
Ammonium dichromate forms orange crystals, and is toxic and corrosive. For this reason, use in hobbyist projects is highly discouraged, and the compound has been largely replaced by thermite.
