Subacetate of lead, Pb(C2H302)2.PbO, dissolved in water, B.P. An aqueous liquid containing in solution about 24 per cent. B.P., 25 per cent. U.S.P., of subacetate of lead.

Characters. - A dense clear colourless liquid, with alkaline reaction and sweet astringent taste, becoming turbid by exposure to the air and forming with mucilage of gum-arabic an opaque white jelly.

Reactions. - It gives the reactions of lead and of an acetate. Preparation. - By boiling acetate of lead, oxide of lead in powder, and distilled water together.

Preparations.

B.P

Glycerinum Plumbi Subacetatis. liquor „ „ Dilutus.

U.S.P

Ceratum Plumbi Subacetatis. Linimentum ,, ,, (v. p. 517).

Liquor ,, „ Dilutus.

Uses. - It is recommended by Ringer as an application to pityriasis and eczema, and in combination with one or two parts of glycerine to the milder forms of lupus after the crusts have been removed. Diluted, and mixed with liquor morphinae acetatis, it is a useful application to haemorrhoids.

B.P. Glycerinum Plumbi Subacetatis. Glycerine of Subacetate of Lead.

Preparation. - By boiling acetate of lead, oxide of lead, glycerine and water together and evaporating off the water.

Preparation

B.P. Unguentum Glycerini Plumbi Subacetatis. Glycerine of Subacetate of lead 1, soft paraffin 4, hard paraffin 1 1/3 parts.