31250

Potassium chromate

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

• Linear Formula: K₂CrO₄
• CAS Number: 7789-00-6
• Molecular Weight: 194.19
• EC Number: 232-140-5
• MDL number: MFCD00011368
• UNSPSC 코드: 41116107
• PubChem Substance ID: 329753699

속성

• Grade: ACS reagent
• Agency: reag. Ph. Eur.
• vapor density: 6.7 (vs air)
• grade: puriss. p.a.
• 분석: ≥99.5%
• 불순물: ≤0.005% in water insoluble matters
• pH: 8.6-9.8 (20 °C, 5%)
• mp: 971 °C (lit.)
• 음이온 미량물: chloride (Cl^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• 양이온 미량물: 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

설명

일반 설명

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.

안전성 정보

• 픽토그램: GHS08,GHS07,GHS09
• 신호어: Danger
• 유해 및 위험 성명서: H315,H317,H319,H335,H340,H350i,H410
• 예방조치 성명서: 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
• 표적 기관: Respiratory system
• Storage Class Code: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable