推薦產品
等級
ACS reagent
puriss. p.a.
agency
reag. Ph. Eur.
蒸汽密度
6.7 (vs air)
化驗
≥99.5%
雜質
≤0.005% in water insoluble matters
pH值
8.6-9.8 (20 °C, 5%)
mp
971 °C (lit.)
負離子痕跡
chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg
正離子痕跡
Ca: ≤50 mg/kg
Fe: ≤20 mg/kg
Na: ≤200 mg/kg
Pb: ≤50 mg/kg
SMILES 字串
[K+].[K+].[O-][Cr]([O-])(=O)=O
InChI
1S/Cr.2K.4O/q;2*+1;;;2*-1
InChI 密鑰
XMXNVYPJWBTAHN-UHFFFAOYSA-N
尋找類似的產品？ 前往 產品比較指南
一般說明
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.
訊號詞
Danger
危險分類
Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
標靶器官
Respiratory system
儲存類別代碼
6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
水污染物質分類（WGK）
WGK 3
閃點（°F）
Not applicable
閃點（°C）
Not applicable
分析證明 (COA)
輸入產品批次/批號來搜索 分析證明 (COA)。在產品’s標籤上找到批次和批號，寫有 ‘Lot’或‘Batch’.。
Redetermination of the structures of potassium sulphate and potassium chromate: the effect of electrostatic crystal forces upon observed bond lengths.
McGinnety JA.
Acta Crystallographica Section B, Structural Science, 28(9), 2845-2852 (1972)
Comparative Study of Factors Influencing the Action of Corrosion Inhmitors for Mild Steel in Neutral Solution: II. Potassium Chromate.
Mercer AD and Jenkins IR.
British Corrosion Journal, 3(3), 130-135 (1968)
Eagleson M.
Concise Encyclopedia Chemistry, 881-881 (1994)
A new method of potassium chromate production from chromite and KOH-KNO3-H2O binary submolten salt system.
Sun Z, et al.
AIChE Journal, 55(10), 2646-2656 (2009)
Ying Li et al.
Colloids and surfaces. B, Biointerfaces, 65(1), 25-29 (2008-04-02)
Adsorption thermodynamic characteristic and kinetics of dissolved chromium from aqueous solutions onto humic acids (HAs) were studied. The results showed that the Freundlich isotherm model described the equilibrium data well. The negative DeltaG degrees confirmed the spontaneity of adsorption process.
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