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Molecule
Potassium Dichromate
CAS: 7778-50-9 · H2Cr2K2O7
2D Structure
3D Structure
Loading 3D structure...
Basic Information
- CAS Registry Number
- 7778-50-9
- Molecular Formula
- H2Cr2K2O7
- Molecular Mass
- 296.20 g/mol
Identifiers
CAS Registry Number
7778-50-9
SMILES
[Cr+].[Cr+].[K].[K].[OH-].[OH-].[O].[O].[O].[O].[O]
InChI Key
WFNKVMJUPPUFIO-UHFFFAOYSA-L
InChI
InChI=1S/2Cr.2K.2H2O.5O/h;;;;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2
Names and Synonyms
- Potassium Dichromate Common Name
- Chromic acid (H2Cr2O7), potassium salt (1:2) Synonym
- Dichromic acid (H2Cr2O7), dipotassium salt Synonym
- Chromic acid (H2Cr2O7), dipotassium salt Synonym
- Potassium dichromate Synonym
- Potassium bichromate Synonym
- Potassium dichromate (K2(Cr2O7)) Synonym
- Dichromic acid dipotassium salt Synonym
- Dipotassium dichromate Synonym
- Dipotassium dichromate (K2Cr2O7) Synonym
- Potassium dichromate(VI) Synonym
- Dipotassium bichromate Synonym
- Dipotassium bichromate (K2Cr2O7) Synonym
- Chromium potassium oxide (K2Cr2O7) Synonym
- SRM 935a Synonym
- Dipotassium dichromium heptaoxide Synonym
- C 501 Synonym
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 296.20 g/mol | CAS Common Chemistry |
| 296.19700000000006 g/mol | RDKit | |
| 296.197 g/mol | RDKit | |
| 314.341 g/mol | chempirical lib | |
| Density | 2.68 g/cm³ | CAS Common Chemistry |
| 2.676 g/cm3 @ 25 °C | CAS Common Chemistry | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Potassium_dichromate | CAS Common Chemistry |
| Canonical SMILES | [K].O=[Cr](=O)(O)O[Cr](=O)(=O)O | CAS Common Chemistry |
| InChI | InChI=1S/2Cr.2K.2H2O.5O/h;;;;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2 | CAS Common Chemistry |
| InChI Key | InChIKey=WFNKVMJUPPUFIO-UHFFFAOYSA-L | CAS Common Chemistry |
| Melting Point | 398 °C | CAS Common Chemistry |
| Name | Potassium dichromate | CAS Common Chemistry |
| Heavy Atom Count | 11 | RDKit |
| Hydrogen Bond Acceptors | 2 | RDKit |
| Hydrogen Bond Donors | 0 | RDKit |
| Rotatable Bonds | 0 | RDKit |
| Aromatic Ring Count | 0 | RDKit |
| Topological Polar Surface Area | 202.5 Ų | RDKit |
| LogP | -1.7142000000000002 | RDKit |
| -1.7142 | RDKit | |
| Molar Refractivity | 18.8121 cm³/mol | RDKit |
| Ring Count | 0 | RDKit |
| Formal Charge | 0 | RDKit |
| Fraction Csp3 | 0.0 | RDKit |
| Exact Mass | 295.788480764 g/mol | RDKit |
Spectral Data
NMR, IR, and Mass spectral data
Predicting NMR spectra...
10 ppm
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1
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| Shift (ppm) | Multiplicity | Integration | Assignment |
|---|
200 ppm
180
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140
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100
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40
20
0 ppm
| Shift (ppm) | DEPT | Assignment |
|---|
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
External Resources
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MW = 296.20 g/mol; density = 2.680 g/mL. Edit any field — others recompute live.
