31250

クロム酸カリウム

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

• 化学式: K₂CrO₄
• CAS番号: 7789-00-6
• 分子量: 194.19
• EC Number: 232-140-5
• MDL番号: MFCD00011368
• UNSPSCコード: 41116107
• PubChem Substance ID: 329753699

特性

• グレード: ACS reagent; puriss. p.a.
• 認証: reag. Ph. Eur.
• 蒸気密度: 6.7 (vs air)
• アッセイ: ≥99.5%
• 不純物: ≤0.005% in water insoluble matters
• pH: 8.6-9.8 (20 °C, 5%)
• mp: 971 °C (lit.)
• 微量陰イオン: chloride (Cl^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• 微量陽イオン: Ca: ≤50 mg/kg; Fe: ≤20 mg/kg; Na: ≤200 mg/kg; Pb: ≤50 mg/kg
• SMILES記法: [K+].[K+].[O-][Cr]([O-])(=O)=O
• InChI: 1S/Cr.2K.4O/q;2*+1;;;2*-1
• InChI Key: XMXNVYPJWBTAHN-UHFFFAOYSA-N

詳細

詳細

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.

安全性情報

• ピクトグラム: GHS08,GHS07,GHS09
• シグナルワード: Danger
• 危険有害性情報: H315,H317,H319,H335,H340,H350i,H410
• 注意書き: P202 - P273 - P280 - P302 + P352 - P305 + P351 + P338 - P308 + P313
• 危険有害性の分類: Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• ターゲットの組織: Respiratory system
• 保管分類コード: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• 引火点(°F): Not applicable
• 引火点(℃): Not applicable