重铬酸铵,Ammonium dichromate;ACS reagent, ≥99.5%

红矾铵; Ammonium bichromate;线性分子式: (NH4)2Cr2O7 CAS号: 7789-09-5 分子量: 252.06 EC 号: 232-143-1 MDL编号: MFCD00010879 eCl@ss: 38180716 PubChem化学物质编号: 329755966 NACRES: NB.24
制造商品牌: 西格玛 Sigma-Aldrich
货号(SKU): 402826
CAS号: 7789-09-5
MDL号: MFCD00010879
签订合同 √ 正规发票 √ 技术支持 √ 质量保障 √ 全程可追溯 √
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说明

重铬酸铵是一种具有高氧化电位的六价铬化合物。六价铬属强致癌物和环境污染物。

一般描述

Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential.[1] Hexavalent chromium is potent carcinogen and an environmental pollutant.[2]
 

应用

Ammonium dichromate may be used in the following processes:
  • Oxidation of alcohols in the presence of Mg(HSO4)2 (magnesium hydrogen sulfate) and wet SiO2 (silicon dixide).[3]
  • Preparation of Cr2O3/Al2O3 (chromium (III) oxide/aluminium oxide) catalysts.[4]
  • Oxidative coupling of thiols.[5]
  • Preparation of mesoporous molecular sieves.[6]
  • Preparation of polypyrrole (PPy).[7]
  • Preparation of solid oxide fuel cell (SOFC) interconnect.[8]

 

属性

等级

ACS reagent

质量水平

蒸汽密度

8.7 (vs air)

测定

≥99.5%

形式

crystals

reaction suitability

reagent type: oxidant

杂质

≤0.005% insolubles

缺失

≤3.0% loss on drying

pH值(酸碱度)

3-4 (25 °C, 50 g/L)

mp

170 °C (dec.) (lit.)

痕量阴离子

chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.01%

痕量阳离子

Ca: ≤0.002%
Fe: ≤0.002%
Na: ≤0.005%

SMILES string

N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O

InChI

1S/2Cr.2H3N.2H2O.5O/h;;2*1H3;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2

InChI key

XAQCJVGGJJFLPP-UHFFFAOYSA-L

 

安全信息

警示用语:

Danger

危险分类

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

储存分类代码

4.1A - Other explosive hazardous materials

WGK

WGK 3

商品规格
属性名称属性值
储存温度 Storage temp.常温阴凉避光
全球实时库存 Availability √美国St. Louis ≥ 50 | 欧洲Eur. ≥ 12 | 東京Tokyo ≥ 20 | 香港与北京 ≥ 50
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