Plumbous oxide

Chemical Designations - Synonyms Lead monoxide Lead oxide, yellow Lead protoxide Massicot Plumbous oxide Chemical Formula PbO. 

Lead Oxide, Yellow, or Litharge (Lead Monoxide, Lead Protoxide or Plumbous Oxide). PbO, mw 223.21, yellow to yellowish-red, heavy, odorless pdr or minute, cryst scales mp 888°, bp (vol at red heat) d 9.53g/cc insol in w, ale sol in acet ac, dil nitric acid, in warm solns of fixed alkali hydroxides. It may be prepd in the lab by heating Pb nitrate, carbonate or hydroxide commercially, it is made by heating Pb to a temp considerably above its mp and continually skimming off the litharge produced. It is used in some primer compns... 

Apard [27] found that the addition of finely powdered plumbous oxide, calcium oxide or calcium hydroxide to a 1% nitrocellulose solution in acetone, ether-alcohol or amyl acetate initially brought about an increase of the viscosity. Further addition of these substances caused the nitrocellulose to coagulate, together with the added... 

It has likewise been shown by Morozov [30] that it is possible to coagulate nitrocellulose under the influence of boric acid, in the presence of the following metal oxides Mn, Fe, Ni, Cu, and Zn. This author noticed that the nitrocotton gel formed owing to the influence of the oxides redissolved in the course of time, probably as a result of a change in chemical composition. On the other hand, the precipitate obtained by treating nitrocellulose with plumbous oxide or aluminium oxide is insoluble. Papkov and Khveleva [31] have established that a similar coagulation takes place under the influence of such salts as zinc sulphate, magnesium chloride and aluminium chloride. 

SYNS C.I. 77577 C.I. PIGMENT YELLOW 46 LEAD OXIDE LEAD(II) OXIDE LEAD OXIDE YELLOW LEAD PROTOXIDE LITHARGE Q LITHARGE YELLOW L-28 MASSICOT MASSICOTITE PLUMBOUS OXIDE YELLOW LEAD OCHER... 

EXAMPLE 2 Name the two oxides of lead, PbO and Pb02. Because oxide is 2-, the lead must be 2+ in the first case and 4+ in the other. The names are lead(Il) oxide and lead(IV) oxide, pronounced lead two oxide and lead four oxide, respectively. In the old ous-ic system, the old (Latin) prefixes were used, giving plumbous oxide and plumbic oxide, respectively. 

PLUMBOUS OXIDE (1317-36-8) PbO An oxidizer. Explosive reaction with 90% peroxyformic acid, mbidium acetylide. Reacts violently with strong oxidizers, aluminum carbide boron, chlorine, fluorine, dichloromethylsilane, calcium sulfide, hydrogen peroxide, hydrogen trisulfide (ignition), hydroxylamine (ignition), lithium carbide, metal acetylides, metal powders (e.g., aluminum, molybdenum, sodium, zirconium, etc.), perchloric acid, red phosphorus, selenium oxychloride, sodium. Incompatible with barium sulfide, chemically active metals silicon, sulfuryl chloride. 

Lead Monoxide. Lead oxide yellow plumbous oxide litharge massicot lead protoxide. OPb mol wt 223.21. Pb 92.83%, O 7.17%, PbO, Prepn of high purity PbO Kwestroo, Huizing, J. Inorg. NucL Chem. 27, 1591 (1965) Kwestroo et aL, ibid. 29, 39 (1967). Mfg processes Faith, Keyes St Clark s Industrial Chemicals. F. A. Lowen-heim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 509.513. 

Synonyms Calcined litharge Cl 77577 Lead monooxide Lead monoxide Lead monoxide yellow Lead oxide Lead (II) oxide Lead (2+) oxide Lead (II) oxide yellow Lead protoxide Litharge Litharge pure Pigment yellow 46 Plumbous oxide Yellow lead ocher Empirical OPb Formula PbO... 

The novel mechanism by which these glassy materials are formed involves movement of silicon from the substrate across the Interface to the carbonaceous skeleton of the treated cotton The migration in solid states occurs at temperatures considerably below the melting point of either the siliceous substrate or polymeric plumbous oxide The relatively low temperature of the process suggests that interpenetration by the silicon occurs by an interstitial mechanism ... 

In Table 9.3 the results suggest that the absolute value of the atomic charge in plumbic oxides Pb02 are larger than those in plumbous oxides PbO. However, all the lead xygen crystals are very far from purely ionic compounds. 

Lead oxide PbO (plumbous oxide) can exist in two different modifications. Red lead oxide PbO precipitates in tetragonal crystals. Yellow lead oxide precipitates in rhombic crystals. Yellow Iccid oxide is also called Litharge (= Stone Silver ) this is because this oxide precipitates as slags when plumbiferous silver is refined. According to Atkins Physical Chemistry, these modifications of lead oxide have the following thermodynamic standard values ... 

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