31250

Potassium chromate

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

• Fórmula lineal: K₂CrO₄
• Número de CAS: 7789-00-6
• Peso molecular: 194.19
• EC Number: 232-140-5
• MDL number: MFCD00011368
• UNSPSC Code: 41116107
• PubChem Substance ID: 329753699

Propiedades

• grade: ACS reagent; puriss. p.a.
• agency: reag. Ph. Eur.
• vapor density: 6.7 (vs air)
• assay: ≥99.5%
• impurities: ≤0.005% in water insoluble matters
• pH: 8.6-9.8 (20 °C, 5%)
• mp: 971 °C (lit.)
• anion traces: chloride (Cl^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• cation traces: 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
• InChI key: XMXNVYPJWBTAHN-UHFFFAOYSA-N

Descripción

General description

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.

Información de seguridad

• pictograms: GHS08,GHS07,GHS09
• signalword: Danger
• hcodes: H315,H317,H319,H335,H340,H350i,H410
• pcodes: P202 - P273 - P280 - P302 + P352 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable