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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:
12352300
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)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Concise Inorganic Pharmaceutical Chemistry (phar.Che-I) (2008)
Koenigs-Knorr syntheses with mercuric salts.
Schroeder LR and Green JW.
J. Chem. Soc. Sect. C, 530-531 (1966)
T Endo et al.
Pharmacology & toxicology, 67(5), 431-435 (1990-11-01)
To obtain evidence for difference in the absorptive forms of HgCl2 and HgO from duodenum, the Hg distributions after the duodenal administration of HgCl2 and HgO and the effect of Na2SeO3 on their Hg distributions were compared. The Hg concentrations
Damir Krznarić et al.
Analytical chemistry, 80(3), 742-749 (2008-01-11)
Mercury electrodes preconcentrate metal chalcogenide nanoparticles effectively, enabling their detection at submicromolar concentrations (as Sigma chalcogenide) by adsorptive cathodic stripping voltammetry. Understanding the unique behavior of nanoparticle analytes during preconcentration is critical for lowering detection limits and for quantification. A
S R Krystek et al.
International journal of peptide and protein research, 34(1), 52-55 (1989-07-01)
Treatment of peptides with excess HgO in the presence of alkaline cyanide leads to cleavage of the peptides at glycine residues. The reaction appears to involve both C- and N-mercuration with subsequent release of 2 mol mercury per mol of
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