Lead(II) sulfate (PbSO4) is a white solid in white microcrystalline form. It is also known as fast white, milky white, lead sulfate, or angle iron.

It is often found in the plates/electrodes of car batteries because it is formed when the battery is discharged (when the battery is charged, the lead sulfate is converted back to metallic lead and sulfuric acid or lead dioxide and the positive terminal on the negative terminal sulfuric acid). Lead sulfate is insoluble in water.

Hornstone (lead(II) sulfate, PbSO4) adopts the same orthorhombic crystal structure as celestite (strontium sulfate, SrSO4) and barite (barium sulfate, BaSO4). The structures of all three minerals are in the space group Pbnm (number 62). [6] Each lead(II) ion is surrounded by 12 oxygen atoms from 7 sulfate ions, forming a PbO12 polyhedron. [7] The lead-oxygen distance ranges from 2.612 Å to 3.267 Å, with an average distance of 2.865 Å.

Lead(II) sulfate is prepared by treating lead oxide, hydroxide or carbonate with warm sulfuric acid or by treating soluble lead salts with sulfuric acid.

Alternatively, it can be made by the interaction of lead nitrate and sodium sulfate solutions.

Lead(II) sulfate can be dissolved in concentrated HNO3, HCl, H2SO4 to form acid salt or complex, and can also be dissolved in concentrated alkali to form soluble lead(II) tetrahydroxide [Pb(OH)4]2− complex compound.

PbSO4(s) + H2SO4(l) ⇌ Pb(HSO4)2(aq)

PbSO4(s) + 4NaOH(aq) → Na2[Pb(OH)4](aq) + Na2SO4(aq)

Lead(II) sulfate decomposes when heated above 1000 °C: