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
grade
ACS reagent
Quality Segment
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%
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
General description
Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential. Hexavalent chromium is potent carcinogen and an environmental pollutant.
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.
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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