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Merck

207802

Sigma-Aldrich

重铬酸钾

ACS reagent, ≥99.0%

别名:

红矾钾

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About This Item

线性分子式:
K2Cr2O7
CAS号:
分子量:
294.18
EC號碼:
MDL號碼:
分類程式碼代碼:
12352302
PubChem物質ID:
NACRES:
NB.24

等級

ACS reagent

品質等級

化驗

≥99.0%

形狀

crystals

反應適用性

reagent type: oxidant

雜質

≤0.005% insolubles

損耗

≤0.05% loss on drying

pH值

3.5-5.0 (25 °C, 29.4 g/L)

mp

398 °C (lit.)

負離子痕跡

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.005%

正離子痕跡

Ca: ≤0.003%
Na: ≤0.001%
Na: ≤0.02%
heavy metals (as Pb): ≤5 ppm

SMILES 字串

[K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O

InChI

1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChI 密鑰

KMUONIBRACKNSN-UHFFFAOYSA-N

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一般說明

重铬酸钾为红橙色固体。它的晶体属于三斜晶系。加热至 600°C 以上时,分解得到氧气、铬酸钾和氧化铬 (III)。在酸性介质中起强氧化剂的作用。它可以通过三氧化二铬与碳酸钾和硝酸盐或氧气的熔融合成。

應用

重铬酸钾可用于制备混合软陶纳米复合材料支撑的重铬酸盐试剂。它也可以作为氧化剂,分别用于伯醇和仲醇选择氧化为相应的醛和酮。

訊號詞

Danger

危險分類

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation - STOT SE 3

標靶器官

Cardio-vascular system, Respiratory system

儲存類別代碼

5.1B - Oxidizing hazardous materials

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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Descriptions of crustacean brains have focused mainly on three highly derived lineages of malacostracans: the reptantian infraorders represented by spiny lobsters, lobsters, and crayfish. Those descriptions advocate the view that dome- or cap-like neuropils, referred to as 'hemiellipsoid bodies,' are
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