... ) Molecular Formula: Pb3O4 Molecular Weight: 685.57 Red Lead (Lead Tetroxide )1. Name of Product ... and Standard:Name of Product: Red lead, another name is bright lead, chemical identity ... into while Lead sulphate and it is poisonous.Red Lead is mainly used to make Antirust Paint, ... is 1470 . Heated to 300-500 , changes into Red Lead; With the temperature going on, changes into Yellow ...