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221082

Sigma-Aldrich

Mercury(II) oxide yellow

ACS reagent, ≥99.0%

Synonym(s):

Mercuric oxide yellow

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About This Item

Linear Formula:
HgO
CAS Number:
21908-53-2
Molecular Weight:
216.59
EC Number:
244-654-7
MDL number:
MFCD00011045
UNSPSC Code:
12352303
PubChem Substance ID:
329752247
NACRES:
NB.24

grade

ACS reagent

Quality Level

200

Assay

≥99.0%

form

powder

reaction suitability

reagent type: catalyst
core: mercury

impurities

≤0.005% N compounds
≤0.03% insol. dil. HCl

reduction residue

≤0.05%

mp

500 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.025%
sulfate (SO42-): ≤0.01%

cation traces

Fe: ≤0.003%

SMILES string

O=[Hg]

InChI

1S/Hg.O

InChI key

UKWHYYKOEPRTIC-UHFFFAOYSA-N

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General description

Yellow mercuric oxide shows antibacterial property and is commonly used in ophthalmic ointments.

Application

Yellow mercuric oxide in the presence of mercuric bromide catalyst may be used in the preparation of alkyl β-D-glucopyranoside tetra-O-acetates and tetra-O-benzoates from poly-O-acyl-α-D-glucopyranosyl bromides and different alcohols via Koenigs-Knorr syntheses.

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

Target Organs

Kidney

Storage Class Code

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Koenigs-Knorr syntheses with mercuric salts.
Schroeder LR and Green JW.
J. Chem. Soc. Sect. C, 530-531 (1966)
Concise Inorganic Pharmaceutical Chemistry (phar.Che-I) (2008)
C Sparkes et al.
The Journal of laryngology and otology, 111(9), 814-819 (1997-11-28)
The requirement to phase out mercuric oxide (mercury) batteries on environmental grounds has led to the widespread introduction of zinc-air technology. The possibility arises that high drain hearing aids may not be adequately catered for by zinc-air cells, leading to
D E Korzhevskiĭ
Morfologiia (Saint Petersburg, Russia), 124(4), 93-94 (2003-11-25)
The study was carried out with the aim of improvement of Harris' alum hematoxylin formula. In presented modified formula toxic mercuric oxide (2.5 g) is substituted by potassium iodate (0.55 g). Alum hematoxylin solution prepared according to suggested formula retains
H Suginome et al.
Steroids, 55(8), 353-359 (1990-08-01)
3 beta-Hydroxy-5 alpha-androstan-17-one was transformed into 17-oxa-5 alpha-androstan-3 beta-ol in five steps involving conversion of the 17-ketone via the corresponding lactol to its hypoiodite and thence a regioselective beta-scission under irradiation to give ring D seco iodoformate, from which the
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