Tribasic Lead Sulphate in Fine Powder Form contains maximum 0.3% moisture in it. Tribasic Lead Sulphate provides excellent heat stability in rigid as well as flexible PVC formulations. Tribasic Lead Sulphate is generally used in combination with dibasic lead stearate and lead stearate for better lubrication and heat stability. Tribasic Lead Sulphate in Fine Powder Form is packed in 50 kgs HDPE sack with plastic liner.