Nomenclature
CAS number: 1314-41-6
Lead oxide red; red lead; minium; lead orthoplumbate; mineral orange; mineral red; Paris red; Saturn red; C.I. Pigment Red 105; C.I. 77578.
O
4Pb
3; mol wt 685.60.
O 9.33%, Pb 90.67%.
Pb
3O
4.
Description and references
The article of commerce contains about 90%
Pb3O4; the remainder being chiefly lead monoxide.
Prepn: M. Baudler in Handbook of Preparative
Inorganic Chemistry vol. 1, G. Brauer, Ed.
(Academic Press, New York, 1963) pp 755-757. Structure: S. T. Gross, J. Am. Chem. Soc. 65, 1107 (1943).
Review: Mellor's vol. 7 (1930) pp 672-680. Book: Biologic
Effects of Atmospheric Pollutants: Lead (Nat. Acad. Sci.,
Washington, D.C., 1972) 330 p.
Properties
Bright-red, heavy powder. Poisonous. Dec at ≈500° with evolution of oxygen. d 9.1. Insol in water
or alcohol. Sol in excess glacial acetic acid, in hot HCl with evolution
of Cl, in dil HNO3 in presence of H2O2. LD50 i.p. in rats: 45 mg
Pb/100 g (Lead, 1972).Use
Plasters and ointments; manuf colorless glass; glaze
for faience; flux for porcelain painting, protective paint for iron
and steel; oil-color for ship paints, varnishes; coloring rubber;
cement for glass, gas and steam pipes; storage batteries; pencils
for writing on glass; manuf lead peroxide, matches.