402826

Ammoniumdichromat

ACS reagent, ≥99.5%

• Synonym(e): Ammoniumbichromat
• Lineare Formel: (NH₄)₂Cr₂O₇
• CAS-Nummer: 7789-09-5
• Molekulargewicht: 252.06
• EG-Nummer: 232-143-1
• MDL-Nummer: MFCD00010879
• UNSPSC-Code: 12352302
• eCl@ss: 38180716
• PubChem Substanz-ID: 329755966
• NACRES: NB.24
• Assay: ≥99.5%
• Qualität: ACS reagent
• Form: crystals

Eigenschaften

• Qualität: ACS reagent
• Qualitätsniveau: 200
• Dampfdichte: 8.7 (vs air)
• Assay: ≥99.5%
• Form: crystals
• Eignung der Reaktion: reagent type: oxidant
• Verunreinigungen: ≤0.005% insolubles
• Verlust: ≤3.0% loss on drying
• pH-Wert: 3-4 (25 °C, 50 g/L)
• mp (Schmelzpunkt): 170 °C (dec.) (lit.)
• Anionenspuren: chloride (Cl^-): ≤0.005%; sulfate (SO₄^2-): ≤0.01%
• Kationenspuren: Ca: ≤0.002%; Fe: ≤0.002%; Na: ≤0.005%
• SMILES String: N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O
• InChI: 1S/2Cr.2H3N.2H2O.5O/h;;2*1H3;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2
• InChIKey: XAQCJVGGJJFLPP-UHFFFAOYSA-L

Beschreibung

Allgemeine Beschreibung

Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential. Hexavalent chromium is potent carcinogen and an environmental pollutant.

Anwendung

Ammonium dichromate may be used in the following processes:

• Oxidation of alcohols in the presence of Mg(HSO₄)₂ (magnesium hydrogen sulfate) and wet SiO₂ (silicon dixide).
• Preparation of Cr₂O₃/Al₂O₃ (chromium (III) oxide/aluminium oxide) catalysts.
• Oxidative coupling of thiols.
• Preparation of mesoporous molecular sieves.
• Preparation of polypyrrole (PPy).
• Preparation of solid oxide fuel cell (SOFC) interconnect.

Sicherheitshinweise

• Piktogramme: GHS03,GHS06,GHS08,GHS05,GHS09
• Signalwort: Danger
• H-Sätze: H272,H301,H312,H314,H317,H330,H334,H340,H350,H360,H372,H410
• P-Sätze: P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: 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
• Lagerklassenschlüssel: 4.1A - Other explosive hazardous materials
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable