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Merck
CN

450138

Ammonium dichromate

99.999% trace metals basis

Synonym(s):

Ammonium bichromate

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About This Item

Linear Formula:
(NH4)2Cr2O7
CAS Number:
7789-09-5
Molecular Weight:
252.06
NACRES:
NA.23
PubChem Substance ID:
24868535
UNSPSC Code:
12352302
EC Number:
232-143-1
MDL number:
MFCD00010879
Assay:
99.999% trace metals basis
Form:
crystalline

Key Documents

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Product Name

Ammonium dichromate, 99.999% trace metals basis

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

vapor density

8.7 (vs air)

assay

99.999% trace metals basis

form

crystalline

reaction suitability

reagent type: oxidant

impurities

≤15.0 ppm Trace Metal Analysis

mp

170 °C (dec.) (lit.)

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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

Storage Class

4.1A - Other explosive hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
MKCS0494
MKCR2400
MKCR1986
MKCR1988
MKCR1987

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K L Meert et al.
Annals of emergency medicine, 24(4), 748-750 (1994-10-01)
We report the ingestion of ammonium dichromate by a child that resulted in multiple-organ-system failure and death. Exchange transfusion and hemodialysis were ineffective in removing significant amounts of chromium or causing sustained clinical improvement. We suggest that immediate, large doses
Chromate in colour television tube manufacture.
S Sinclair et al.
Contact dermatitis, 21(5), 353-353 (1989-11-01)
S A Ali
American journal of contact dermatitis : official journal of the American Contact Dermatitis Society, 8(4), 222-224 (1998-01-07)
An outbreak of dermatitis occurred in the Flow Coat sector of a large and modern color television factory. After investigating the working procedures in this area, a risk of contamination of the skin and clothing with ammonium dichromate was found
Investigation and prevention of chromate dermatitis in colour television manufacture.
C J Stevenson et al.
The Journal of the Society of Occupational Medicine, 33(1), 19-20 (1983-01-01)
Shankha S Acharyya et al.
ACS applied materials & interfaces, 6(16), 14451-14459 (2014-08-02)
Three-dimensional (3D) raspberry-like CuCr2O4 spinel nanoparticles were prepared hydrothermally in the presence of cationic surfactant, cetyltrimethylammonium bromide (CTAB). Detailed characterization of the material was carried out by X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), X-ray photoelectron spectroscopy (XPS)
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