207802

Potassium dichromate

ACS reagent, ≥99.0%

• Sinônimo(s): Potassium bichromate
• Fórmula linear: K₂Cr₂O₇
• Número CAS: 7778-50-9
• Peso molecular: 294.18
• Número CE: 231-906-6
• Número MDL: MFCD00011367
• Código UNSPSC: 12352302
• ID de substância PubChem: 329752023
• NACRES: NB.24

Propriedades

• grau: ACS reagent
• Ensaio: ≥99.0%
• forma: crystals
• adequação da reação: reagent type: oxidant
• Impurezas: ≤0.005% insolubles
• perda: ≤0.05% loss on drying
• pH: 3.5-5.0 (25 °C, 29.4 g/L)
• pf: 398 °C (lit.)
• traços de ânion: chloride (Cl^-): ≤0.001%; sulfate (SO₄^2-): ≤0.005%
• traços de cátion: Ca: ≤0.003%; Na: ≤0.001%; Na: ≤0.02%; heavy metals (as Pb): ≤5 ppm
• cadeia de caracteres SMILES: [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
• InChI: 1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1
• chave InChI: KMUONIBRACKNSN-UHFFFAOYSA-N

Descrição

Descrição geral

Potassium dichromate is a red-orange colored solid. Its crystals belong to the triclinic crystal system. On heating above 600°C, it decomposes to give oxygen, potassium chromate and chromium(III) oxide. It acts as a strong oxidizing agent in acidic media. It can be synthesized by the fusion of chromium(III) oxide with potassium carbonate and nitrate or oxygen.

Aplicação

Potassium dichromate may be used in the preparation of hybride polymer-clay nanocomposite supported dichromate reagents. It may also be used as an oxidant for the selective oxidation of primary and secondary alcohol to corresponding aldehydes and ketones, respectively.

Informações de segurança

• Pictogramas: GHS03,GHS06,GHS08,GHS05,GHS09
• Palavra indicadora: Danger
• Frases de perigo: H272,H301,H312,H314,H317,H330,H334,H335,H340,H350,H360FD,H372,H410
• Declarações de precaução: P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classificações de perigo: Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation - STOT SE 3
• Órgãos-alvo: Cardio-vascular system, Respiratory system
• Código de classe de armazenamento: 5.1B - Oxidizing hazardous materials
• Classe de risco de água (WGK): WGK 3
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable