L 1345 (OTTO) Lead carbonate, 98% Cas no 598-63-0 - used in polymerization catalysts. L 1345 (OTTO) Lead carbonate, 98% Cas no 598-63-0 - used in high pressure lubricating greases; as a coating on polyvinyl chloride to improve the dielectric properties of the polymers; in the PVC friction liners for pulleys; in corrosion-resistant grids in lead-storage batteries; in heat-sensitive sheets for thermographic copying; as a photoconductor.