dipotassium [(oxidodioxochromio)oxy]chromiumoylolate

• ChemBase ID: 104538
• Molecular Formular: Cr2K2O7
• Molecular Mass: 294.1846
• Monoisotopic Mass: 293.7728307
• 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

NAMES AND DATABASE IDS

Names

• 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

Database IDs

• CAS Number: 7778-50-9
• EC Number: 231-157-5; 231-906-6
• MDL Number: MFCD00011367
• Merck Index: 147627
• PubChem SID: 24866317; 24859156; 162093106; 24881808; 24858901; 24871862; 24898614; 24861760; 24861758; 24861393; 24860723; 24898340; 24852473; 24863781
• PubChem CID: 24502
• CHEMBL: 1374101
• Chemspider ID: 22910
• Wikipedia Title: Potassium_dichromate

CALCULATED PROPERTIES

• Acid pKa: -2.30103
• H Acceptors: 6
• H Donor: 0
• LogD (pH = 5.5): -8.234395
• LogD (pH = 7.4): -8.2344
• Log P: -3.7068
• Molar Refractivity: 10.0076 cm^3
• Polarizability: 11.546313 Å^3
• Polar Surface Area: 123.63 Å^2
• Rotatable Bonds: 2
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 4.9 g/100 mL (0 °C) ; 102 g/100 mL (100 °C) in water; H2O: soluble0.1 M at 20 °C, clear, orange; insoluble in alcohol; Soluble in water
• Apperance: crystalline; Crystalline; fine crystals; Liquid; red-orange crystalline solid
• Melting Point: 398 °C; 398 °C(lit.); 398 °C; 398°C
• Boiling Point: 500 °C; 500 °C decomp.
• Flash Point: non-flammable
• Density: 1.000 g/mL at 25 °C; 2.676; 2.676 g/cm^3, solid; 2.676 g/m3
• Refractive Index: 1.738
• Odor: odorless
• Std enthalpy of formation: -2033 kJ/mol
• Std molar entropy: 291.2 J K^−1 mol^−1
• pH: 3.5-5.0 (25 °C, 0.1 M in H2O)

Safety Information

• Storage Condition: Room Temperature (15-30°C)
• RTECS: HX7680000
• European Hazard Symbols: Carc. Cat. 2; Corrosive (C); Dangerous for the environment (N); Harmful (Xn); Highly toxic (T+); Muta. Cat. 2; Nature polluting (N); Oxidising (O); Oxidant (O); Repr. Cat. 2; Toxic (T); Highly toxic (T+)
• UN Number: 3082; 3086; 3287; 3288; UN3087; UN3287
• German water hazard class: 3
• Hazard Class: 5.1; 6.1; 9
• Packing Group: 1; 3; I; II; III
• Australian Hazchem: 2W
• Risk Statements: 45-46-20-51/53; 45-46-20-52/53; 45-46-60-61-20-51/53; 45-46-60-61-22-23-36/37/38-42/43-48/20-50/53; 45-46-60-61-22-23-42/43-48/20-51/53; 45-46-60-61-23-42/43-48/20-51/53; 45-46-60-61-42/43-48/20-52/53; 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53; 45-46-60-61-8-22-26-34-37-42/43-48/23-51/53; R:8-21-25-26-37/38-41-43-46-49-50/53; R45, R46, R60, R61, R8, R21, R25, R26, R34, R42/43, R48/23, R50/53
• Safety Statements: 53-23-26-28-36/37/39-45-57; 53-23-26-36/37-45-61; 53-23-36/37-45-61; 53-24-37-45-57; 53-24-37-45-61; 53-45-60-61; 53-45-61; S:14-45-53-60-61; S53, S45, S60, S61
• EU Classification: TO2
• EU Hazard Identification Number: 6.1A
• Emergency Response Guidebook(ERG) Number: 141
• TSCA Listed: 是
• EU Index: 024-002-00-6
• GHS Pictograms: GHS03; GHS05; GHS06; GHS07; GHS08; GHS09
• GHS Signal Word: Danger
• NFPA704:
  

  0

  4

  1

  OX
• GHS Hazard statements: H272-H301-H312-H314-H317-H330-H334-H340-H350-H360FD-H372-H410; H272-H301-H312-H314-H317-H330-H334-H340-H350-H360-H372-H410; H272-H301-H330-H312-H317-H334-H340-H350-H360-H372-H314-H400-H410; H272-H331-H302-H317-H335-H336-H334-H340-H350-H360-H372-H314-H411; H302-H314-H317-H331-H334-H335-H340-H350-H360FD-H373-H410; H302-H314-H317-H332-H334-H335-H340-H350-H360FD-H373-H410; H315-H317-H319-H334-H340-H350-H360FD-H373-H411; H332-H340-H350-H360FD-H411; H334-H340-H350-H360-H315-H319-H317-H373-H333-H412; H334-H340-H350-H360-H317-H373-H318-H315-H332-H303-H411; H340-H350-H360FD-H411; H340-H350-H412
• GHS Precautionary statements: P201-P220-P260-P273-P280-P284; P201-P261-P273-P280-P305 + P351 + P338-P308 + P313; P201-P261-P273-P280-P305 + P351 + P338-P310; P201-P273-P308 + P313; P221-P210-P303+P361+P353-P305+P351+P338-P405-P501A; P221-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P320-P330-P405-P501A; P260-P285-P305+P351+P338-P302+P352-P405-P501A
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P2 (EN 143) respirator cartridges, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 3082 9/PG 3; UN 3086 6.1/PG 1; UN 3287 6.1/PG 3

Product Information

• Purity: ≥98%; ≥99%; ≥99.0%; ≥99.0% (RT); ≥99.5%; ≥99.5% (RT); ≥99.8%; 99%; 99.0% min; 99.95-100.05%; 99.99% trace metals basis
• Concentration: 0.02 M K2Cr2O7; 0.0950-0.1050 N (Exact value stated on label); 1 mg/mL Cr; 1/10 N; 1/25 M K2Cr2O7 (0.24N); 1/6 M K2Cr2O7 (1N); 1/60 M; 1/60 M K2Cr2O7 (0.1N); 1000 ppm Cr
• Grade: ACS reagent; ACS reagent, reag. ISO, reag. Ph. Eur.; for COD determination according to DIN 38409, part 41; JIS special grade; puriss.; puriss. p.a.; purum; purum p.a.; ReagentPlus®; SAJ first grade; technical
• Packaging: pkg of 1/60 mol (4.903 g K2Cr2O7)
• Suitability: suitable for atomic absorption spectrometry
• Impurities: <0.005% Phosphorus (P); <0.1% Insoluble matter; ≤0.005% insolubles; ≤0.005% water insolubles; insoluble matter, passes filter test
• Cation Traces: Al: <0.0005%; Ca: <0.0005%; Ca: ≤0.003%; Ca: ≤20 mg/kg; Ca: ≤50 mg/kg; Cd: ≤10 mg/kg; Cd: ≤50 mg/kg; Co: ≤20 mg/kg; Co: ≤50 mg/kg; Cu: <0.0005%; Cu: ≤10 mg/kg; Cu: ≤50 mg/kg; Fe: <0.001%; Fe: ≤10 mg/kg; Fe: ≤20 mg/kg; Fe: ≤50 mg/kg; heavy metals (as Pb): ≤5 ppm; Mg: <0.0005%; Mg: ≤10 mg/kg; Mg: ≤5 mg/kg; Mn: ≤10 mg/kg; Mn: ≤5 mg/kg; Na: <0.05%; Na: ≤0.001%; Na: ≤0.02%; Na: ≤100 mg/kg; Na: ≤200 mg/kg; Na: ≤500 mg/kg; Ni: ≤20 mg/kg; Ni: ≤50 mg/kg; Pb: <0.001%; Pb: ≤50 mg/kg; Sr: ≤50 mg/kg; Zn: ≤0.001%; Zn: ≤10 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: chloride (Cl-): ≤0.001%; chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤200 mg/kg; chloride (Cl-): ≤50 mg/kg; sulfate (SO42-): <0.005%; sulfate (SO42-): ≤0.005%; sulfate (SO42-): ≤200 mg/kg; sulfate (SO42-): ≤50 mg/kg; sulfate (SO42-): ≤500 mg/kg
• Shelf Life: (limited shelf life, expiry date on the label)
• Loss on Drying: ≤0.05% loss on drying; ≤0.05% loss on drying, 105 °C; ≤0.05% loss on drying, 110 °C
• Quality: volumetric
• Factor: 1.000 ±0.001
• Product Line: BioUltra
• abs.: absorption0.1M/, H2O no transmittance (UV)
• Linear Formula: K2Cr2O7

DETAILS

MP Biomedicals - 02156338

Crystalline

Sigma Aldrich - 483044

Packaging
10, 50 g in poly bottle

Sigma Aldrich - 35171

General description
Visit our Titration Center to learn more.

Sigma Aldrich - 35169

General description
Visit our Titration Center to learn more.

Sigma Aldrich - P5271

包装
2 kg in poly bottle
25, 500 g in poly bottle
法律信息
ReagentPlus 注册商标 Sigma-Aldrich Co. LLC

Sigma Aldrich - 42019

Analysis Note
Exact concentration, expiry date, traceability and detailed information on certification can be found on the certificate and certification report, included in each package. Content and expiry date on label.

Sigma Aldrich - 38100

General description
Visit our Titration Center to learn more.
concentration after dilution to 1L: 1/60mol/L (0.1N); amount of substance 1/60mol (4.903 g K2Cr2O7)

Sigma Aldrich - 207802

Packaging
100, 500 g in poly bottle

Sigma Aldrich - 24-4475

Suitability
standard

Sigma Aldrich - 34271

General description
Visit our Titration Center to learn more.

Sigma Aldrich - 60190

Other Notes
Oxidizing agent for decomposition by fusion1,2

Sigma Aldrich - P2588

包装
1 kg in poly bottle
250 g in poly bottle

Sigma Aldrich - 319317

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle
Packaged in poly bottles

Sigma Aldrich - 34631

Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 309176

Packaging
100 g in glass bottle

REFERENCES

• Can be used catalytically in comblnation with Sodium percarbonate, A16045, as the stoichiometric oxidant under phase transfer conditions, for the oxidation of secondary alcohols to ketones: Synth. Commun., 25, 2349 (1995).
• Optimal conditions have been determined for the oxidation of enamines to ketones in a biphasic ether-water solvent system: Tetrahedron Lett., 36, 2921 (1995).