402826
重铬酸铵
ACS reagent, ≥99.5%
别名:
红矾铵
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关于此项目
线性分子式:
(NH4)2Cr2O7
化学文摘社编号:
分子量:
252.06
PubChem Substance ID:
eCl@ss:
38180716
UNSPSC Code:
12352302
NACRES:
NB.24
EC Number:
232-143-1
MDL number:
Assay:
≥99.5%
Grade:
ACS reagent
Form:
crystals
产品名称
重铬酸铵, ACS reagent, ≥99.5%
InChI key
XAQCJVGGJJFLPP-UHFFFAOYSA-L
InChI
1S/2Cr.2H3N.2H2O.5O/h;;2*1H3;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2
SMILES string
N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O
grade
ACS reagent
vapor density
8.7 (vs air)
assay
≥99.5%
form
crystals
reaction suitability
reagent type: oxidant
impurities
≤0.005% insolubles
loss
≤3.0% loss on drying
pH
3-4 (25 °C, 50 g/L)
mp
170 °C (dec.) (lit.)
anion traces
chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.01%
cation traces
Ca: ≤0.002%
Fe: ≤0.002%
Na: ≤0.005%
Quality Level
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Application
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).
- Preparation of Cr2O3/Al2O3 (chromium (III) oxide/aluminium oxide) catalysts.
- Oxidative coupling of thiols.
- Preparation of mesoporous molecular sieves.
- Preparation of polypyrrole (PPy).
- Preparation of solid oxide fuel cell (SOFC) interconnect.
General description
Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential. Hexavalent chromium is potent carcinogen and an environmental pollutant.
signalword
Danger
Hazard Classifications
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
存储类别
4.1A - Other explosive hazardous materials
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
法规信息
易制爆化学品
危险化学品
此项目有
Voltammetry of chromium (VI) at the liquid| liquid interface.
O'Mahony AM, et al.
Electrochemical Communications, 7(10), 976-982 (2005)
Synthesis of La 0.7Ca0.3CrO3 SOFC interconnect using a chromium source.
Ghosh S, et al.
Electrochemical and Solid-State Letters, 9(11), A516-A519 (2006)
Synthesis, characterization and catalytic application of Cr-SBA-1 mesoporous molecular sieves.
Zhao X and Wang X.
J. Mol. Catal. A: Chem., 261(2), 225-231 (2007)
Polypyrrole as a protective pigment in organic coatings
Selvaraj M, et al.
Synthetic Metals, 158(21), 888-899 (2008)
Hexavalent chromium (VI): Environment pollutant and health hazard.
Das AP and Mishra S.
Journal of Environmental Research And Development, 2(3), 386-392 (2008)
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