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450138

Sigma-Aldrich

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
EC Number:
232-143-1
MDL number:
MFCD00010879
UNSPSC Code:
12352302
PubChem Substance ID:
24868535
NACRES:
NA.23

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.)

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

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Signal Word

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 Code

4.1A - Other explosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH SVHC Candidate List

CAS No.

EU REACH Annex XVII (Restriction List)

CAS No.

EU REACH Annex XIV (Authorisation List)

CAS No.

Certificates of Analysis (COA)

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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)
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
Chromate in colour television tube manufacture.
S Sinclair et al.
Contact dermatitis, 21(5), 353-353 (1989-11-01)
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
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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