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7778-50-9 molecular structure
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dipotassium [(oxidodioxochromio)oxy]chromiumoylolate

ChemBase ID: 104538
Molecular Formular: Cr2K2O7
Molecular Mass: 294.1846
Monoisotopic Mass: 293.7728307
SMILES and InChIs

SMILES:
[K+].[K+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]
Canonical SMILES:
[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+]
InChI:
InChI=1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1
InChIKey:
KMUONIBRACKNSN-UHFFFAOYSA-N

Cite this record

CBID:104538 http://www.chembase.cn/molecule-104538.html

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NAMES AND DATABASE IDS

NAMES AND DATABASE IDS

Names Database IDs
IUPAC name
dipotassium [(oxidodioxochromio)oxy]chromiumoylolate
IUPAC Traditional name
dipotassium chromate
dipotassium ion chromate
Synonyms
Potassium bichromate
Potassium dichromate, 0.25N Standardized Solution
Potassium dichromate, 0.1N Standardized Solution
Potassium dichromate, 0.025N Standardized Solution
Potassium dichromate, Acculute Standard Volumetric Solution, Final Concentration 0.1N
Potassium dichromate, ACS
Potassium dichromate
POTASSIUM DICHROMATE
Potassium dichromate solution
Potassium dichromate concentrate
Potassium dichromate solution
Chromium standard solution
重铬酸钾, 0.25N标准溶液
重铬酸钾, 0.1N 标准溶液
重铬酸钾, 0.025N标准溶液
重铬酸钾, 可稀释标准标定液, 最终浓度 0.1N
重铬酸钾, ACS
红矾钾
重铬酸钾
重铬酸钾 溶液
Chromium standard solution
CAS Number
7778-50-9
EC Number
231-906-6
231-157-5
MDL Number
MFCD00011367
Merck Index
147627
PubChem SID
24871862
24898614
24861760
24861758
24861393
24860723
162093106
24881808
24858901
24866317
24859156
24898340
24852473
24863781
PubChem CID
24502
CHEMBL
1374101
Chemspider ID
22910
Wikipedia Title
Potassium_dichromate

CALCULATED PROPERTIES

CALCULATED PROPERTIES

JChem
Acid pKa -2.30103  H Acceptors
H Donor LogD (pH = 5.5) -8.234395 
LogD (pH = 7.4) -8.2344  Log P -3.7068 
Molar Refractivity 10.0076 cm3 Polarizability 11.546313 Å3
Polar Surface Area 123.63 Å2 Rotatable Bonds
Lipinski's Rule of Five true 

PROPERTIES

PROPERTIES

Physical Property Safety Information Product Information Bioassay(PubChem)
Solubility
4.9 g/100 mL (0 °C)
102 g/100 mL (100 °C) in water
expand Show data source
H2O: soluble0.1 M at 20 °C, clear, orange expand Show data source
insoluble in alcohol expand Show data source
Soluble in water expand Show data source
Apperance
crystalline expand Show data source
Crystalline expand Show data source
fine crystals expand Show data source
Liquid expand Show data source
red-orange crystalline solid expand Show data source
Melting Point
398 °C expand Show data source
398 °C(lit.) expand Show data source
398 °C expand Show data source
398°C expand Show data source
Boiling Point
500 °C expand Show data source
500 °C decomp. expand Show data source
Flash Point
non-flammable expand Show data source
Density
1.000 g/mL at 25 °C expand Show data source
2.676 expand Show data source
2.676 g/cm3, solid expand Show data source
2.676 g/m3 expand Show data source
Refractive Index
1.738 expand Show data source
Odor
odorless expand Show data source
Std enthalpy of formation
-2033 kJ/mol expand Show data source
Std molar entropy
291.2 J K−1 mol−1 expand Show data source
pH
3.5-5.0 (25 °C, 0.1 M in H2O) expand Show data source
Storage Condition
Room Temperature (15-30°C) expand Show data source
RTECS
HX7680000 expand Show data source
European Hazard Symbols
Carc. Cat. 2 expand Show data source
Corrosive (C) expand Show data source
Dangerous for the environment (N) expand Show data source
Harmful (Xn) expand Show data source
Highly toxic (T+) expand Show data source
Muta. Cat. 2 expand Show data source
Nature polluting Nature polluting (N) expand Show data source
Oxidising Oxidising (O) expand Show data source
Oxidant (O) expand Show data source
Repr. Cat. 2 expand Show data source
Toxic Toxic (T) expand Show data source
Highly toxic Highly toxic (T+) expand Show data source
UN Number
3082 expand Show data source
3086 expand Show data source
3287 expand Show data source
3288 expand Show data source
UN3087 expand Show data source
UN3287 expand Show data source
MSDS Link
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German water hazard class
3 expand Show data source
Hazard Class
5.1 expand Show data source
6.1 expand Show data source
9 expand Show data source
Packing Group
1 expand Show data source