31250

Kaliumchromat

puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5%

• Lineare Formel: K₂CrO₄
• CAS-Nummer: 7789-00-6
• Molekulargewicht: 194.19
• EG-Nummer: 232-140-5
• MDL-Nummer: MFCD00011368
• UNSPSC-Code: 41116107
• PubChem Substanz-ID: 329753699

Eigenschaften

• Qualität: ACS reagent; puriss. p.a.
• Agentur: reag. Ph. Eur.
• Dampfdichte: 6.7 (vs air)
• Assay: ≥99.5%
• Verunreinigungen: ≤0.005% in water insoluble matters
• pH-Wert: 8.6-9.8 (20 °C, 5%)
• mp (Schmelzpunkt): 971 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• Kationenspuren: Ca: ≤50 mg/kg; Fe: ≤20 mg/kg; Na: ≤200 mg/kg; Pb: ≤50 mg/kg
• SMILES String: [K+].[K+].[O-][Cr]([O-])(=O)=O
• InChI: 1S/Cr.2K.4O/q;2*+1;;;2*-1
• InChIKey: XMXNVYPJWBTAHN-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Potassium chromate (K₂CrO₄) is the potassium salt having morphological features similar to potassium sulfate (isostructural). Its crystals exhibit rhombic crystal system. It can be manufactured by reacting potassium dichromate with potassium hydroxide. It has been reported to crystallize in orthorhombic space group. Production of potassium chromat by a new reaction system of KOH-KNO₃-H₂O (binary submolten salt system) has been proposed.

Sicherheitshinweise

• Piktogramme: GHS08,GHS07,GHS09
• Signalwort: Danger
• H-Sätze: H315,H317,H319,H335,H340,H350i,H410
• P-Sätze: P202 - P273 - P280 - P302 + P352 - P305 + P351 + P338 - P308 + P313
• Gefahreneinstufungen: Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• Zielorgane: Respiratory system
• Lagerklassenschlüssel: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable