Lead Monoxide - Materials / Alfa Chemistry

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Lead Monoxide

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Catalog Number

ACMA00014340

Product Name

Lead Monoxide

Category

Glass Additives

Description

Litharge appears as odorless gray or yellow green or red-brown solid. Sinks in water. (USCG, 1999);DryPowder; DryPowder, OtherSolid; OtherSolid; WetSolid;RED-TO-YELLOW CRYSTALS.

IUPAC Name

oxolead

Molecular Weight

223g/mol

Molecular Formula

PbO;PbO;OPb

Canonical SMILES

O=[Pb]

InChI

InChI=1S/O.Pb

InChI Key

YEXPOXQUZXUXJW-UHFFFAOYSA-N

Boiling Point

1472 °C;1470 °C

Melting Point

887 °C;888 °C

Density

9.5 at 68 °F (USCG, 1999);9.64 g/cu cm;9.5 g/cm³

Solubility

In water: 0.0504 g/L at 25 °C (alpha form); 0.1065 g/L at 25 °C (beta form);Water: 0.017 g/L at 20 °C;Insoluble in water, alcohol; soluble in acetic acid, dilute nitric acid, warm soln of fixed alkali hydroxides;Soluble in ammonium chloride;Solubility in water: none

Color/Form

Exists in 2 forms: red to reddish-yellow, tetragonal crystals at ordinary temperature; yellow, orthorhombic crystals, stable above 489 °C;Yellow orthorhombic crystals

Complexity

Covalently-Bonded Unit Count

EC Number

215-267-0

Exact Mass

223.97157g/mol

Formal Charge

Heavy Atom Count

ICSC Number

0288

MeSH Entry Terms

lead dioxide;lead monoxide;lead oxide

Monoisotopic Mass

223.97157g/mol

NSC Number

57634

Other Experimental

Commercial grades are yellow to reddish, depending on treatment and purity;MP: 897 °C, begins to sublime before melting;Density: 9.53 g/cu cm (alpha); 9.6 g/cu cm (beta);At 300-450 °C in air converted slowly into lead tetraoxide (Pb3O4) but at higher temp reverts to lead oxide (PbO);Reddish, alpha form (litharge)is stable up to 489 °C where it transforms to the yellow, beta form (massicot). The latter is stable at high temperatures.;Amphoteric, dissolving in acids and alkalies. In alkalies, it forms the plumbite ion, PbO2(2-).

Rotatable Bond Count

RTECS Number

OG1750000

Stability

Stable under recommended storage conditions.;Exists in 2 forms: (1) Red to reddish-yellow, tetragonal crystals; stable at ordinary temps. (2) Yellow, orthorhombic crystals; stable >489 °C

UN Number

2291;3288;3077

Vapor Pressure

1 Pa at 724 °C; 10 Pa at 816 °C; 100 Pa at 928 °C; 1kPa at 1065 °C; 10 kPa at 1241 °C; 100 kPa at 1471 °C

MSDS

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COA

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Spec Sheet

Download Spec Sheet

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